The 2026 Senate Races Ranked by Flip Likelihood
The 15 most competitive Senate contests of 2026, ranked by a consensus of the race ratings published by Cook Political Report, Sabato's Crystal Ball, and Inside Elections, updated after the August 11, 2026 primaries locked nominees in Minnesota, Michigan, and set a South Carolina runoff.
How this ranking works
This ranking measures one thing: how likely each Senate seat is to change party hands in November 2026. No official score exists for that question, so this is an ordinal, analytical ranking built on the published ratings of three named, nonpartisan handicappers: The Cook Political Report with Amy Walter, Sabato's Crystal Ball at the University of Virginia Center for Politics, and Inside Elections with Nathan L. Gonzales. Each rating is attributed to its rater and dated where the rater announced a change. Where the three disagree, the entry says so.
The composite score converts each rater's category into points for the non-incumbent party (Toss Up = 3, Lean = 2, Likely = 1, Solid or Safe = 0), averages across raters, and then adjusts within categories using publicly released July 2026 general election polling, principally the New York Times/Siena College battleground surveys released the week of June 29, 2026. Scores are on a 0 to 10 scale where 10 means a flip is more likely than not. The per-race subscores published below expose the same components: the numeric lean each rater assigned on a common scale, plus the certified 2024 presidential margin in the state, inverted so that a closer state reads as a fuller meter.
The framework pays no attention to which party benefits from a flip. A Republican seat rated Toss Up and a Democratic seat rated Toss Up are scored by the same ruler. Fundraising totals, candidate charisma, and campaign rhetoric are ignored except where a named rater cited them in a rating change. There are 35 seats up in 2026, now including special elections in Florida, Ohio, and South Carolina, the last added when Sen. Lindsey Graham died in office on July 11, 2026; 23 are held by Republicans, and Democrats need a net gain of four seats for a majority (Cook Political Report, 2026; Washington Post, July 12, 2026).
Ratings move, and so do candidates. This table reflects the raters' published positions as of July 3, 2026, updated on July 9, 2026 to reflect Graham Platner's withdrawal from the Maine race and the first poll of his possible replacements, on July 11, 2026 to reflect the death of Sen. Lindsey Graham and the resulting South Carolina special election, on July 27, 2026 to reflect Maine Democrats nominating Troy Jackson 566 to 5 on July 25 to face Collins, on July 30, 2026 to reflect Sabato's Crystal Ball moving Georgia (Ossoff) from Leans Democratic to Likely Democratic, and on August 12, 2026 to lock nominees after the August 11 primaries: Peggy Flanagan and Michele Tafoya in Minnesota, Abdul El-Sayed already nominated in Michigan from the August 4 primary, and Darline Graham versus Ralph Norman in the August 25 South Carolina runoff. The rating, the rater, and the date are the receipts.
1North CarolinaOpen seat, R-held. Roy Cooper (D) vs. Michael Whatley (R)8.8
The only 2026 seat the major raters currently rate to flip: Cook moved it from Toss Up to Lean Democrat on June 11, 2026, and Sabato's Crystal Ball also rates it Leans Democratic (Cook Political Report, 2026; Sabato's Crystal Ball, 2026). Former Gov. Roy Cooper led former RNC chairman Michael Whatley 50 to 43 in the New York Times/Siena poll released the week of June 29 (NYT/Siena, 2026).
The receipts: North Carolina has not elected a Democrat to the Senate since Kay Hagan in 2008, the same year it last went Democratic at the presidential level (NC Newsline, 2026). Cook and Sabato's Crystal Ball both moved the open seat off Toss Up to Lean Democrat on June 11, 2026, the only 2026 race either rates outside the tossup band toward a flip; Cooper's 50 to 43 edge over Whatley in the late-June NYT/Siena survey is the widest documented lead of any competitive Senate race this cycle (Cook Political Report, 2026; NYT/Siena, 2026).
2MaineSen. Susan Collins (R), seeking a sixth term, vs. Troy Jackson (D), nominated July 25, 20267.7
Inside Elections moved Maine from Tilt Republican to Toss-up on September 22, 2026, joining Cook Political Report and Sabato's Crystal Ball in the tossup band (Inside Elections via Roll Call, September 22, 2026; Cook Political Report, 2026; Sabato's Crystal Ball, 2026). Sen. Susan Collins (R) faces Troy Jackson (D), nominated after the July nominating path settled.
The receipts: Inside Elections' September 22, 2026 Toss-up print completes a three-rater tossup for Maine after months at Tilt Republican; Roll Call called it the week's most significant Senate shift (Inside Elections via Roll Call, September 22, 2026).
3Ohio (special)Appointed Sen. Jon Husted (R) vs. former Sen. Sherrod Brown (D)7.7
Cook and Sabato's Crystal Ball already rate Husted versus Brown a Toss-up; Inside Elections joined them on September 3, 2026, moving Ohio from Tilt Republican to Toss-up (Cook Political Report, 2026; Sabato's Crystal Ball, 2026; Inside Elections via X, September 4, 2026; Wikipedia Ohio special predictions table, September 2026).
The receipts: Inside Elections' September 3, 2026 Senate package lists Ohio Tilt Republican to Toss-up, and Wikipedia records Inside Elections as Tossup as of September 3, 2026 (Inside Elections via X, September 4, 2026; 270toWin Inside Elections Senate note, September 2026; Wikipedia, September 2026).
4AlaskaSen. Dan Sullivan (R) vs. former Rep. Mary Peltola (D)6.6
Cook and Sabato's Crystal Ball rate Sullivan versus Peltola a Toss-up. Inside Elections moved the race from Lean Republican to Tilt Republican on September 3, 2026, a one-notch step toward Democrats that still stops short of the other two raters' Toss-up prints (Cook Political Report, 2026; Sabato's Crystal Ball, 2026; Inside Elections via X, September 4, 2026; Wikipedia Alaska Senate predictions table, September 2026; Ballotpedia ratings trail, September 2026).
The receipts: Inside Elections announced Alaska Lean Republican to Tilt Republican in its September 3, 2026 Senate package; Wikipedia lists Inside Elections as Tilt R as of September 3, 2026, while Ballotpedia's weekly trail showed Lean Republican through September 1 before that move (Inside Elections via X, September 4, 2026; Wikipedia, September 2026; Ballotpedia, September 2026).
5TexasAttorney General Ken Paxton (R) vs. state Rep. James Talarico (D)6.4
Cook Political Report moved Texas from Lean Republican to Toss Up on August 20, 2026, and Sabato's Crystal Ball matched that Toss-up on August 26, 2026 for Paxton versus Talarico (Cook Political Report, August 20, 2026; Washington Examiner, August 20, 2026; Sabato's Crystal Ball, August 26, 2026). Inside Elections had already softened the seat to Lean Republican in its August package and did not move Texas again in the September 3 Senate shorts (Inside Elections / Roll Call, August 17, 2026; Inside Elections via X, September 4, 2026).
The receipts: Cook's August 20, 2026 Toss Up shift and Sabato's August 26, 2026 Toss-up shift are the receipts for Texas's climb on this board (Cook Political Report, August 20, 2026; Washington Examiner, August 20, 2026; Sabato's Crystal Ball rating-changes table, August 26, 2026).
6New HampshireOpen seat, D-held. Rep. Chris Pappas (D) vs. former Sen. John E. Sununu (R)6.3
Cook Political Report moved the open New Hampshire Senate race from Lean Democrat to Toss Up on September 15, 2026, citing former Sen. John E. Sununu's polling and Republican spending against Rep. Chris Pappas (Cook Political Report, September 15, 2026; The Washington Post, September 15, 2026; The Hill, September 15, 2026). Inside Elections already rated the seat Toss-up as of September 3; Sabato's Crystal Ball still rates Leans Democratic (Washington Examiner, September 15, 2026; Sabato's Crystal Ball, 2026). An August University of New Hampshire poll had Sununu 45 percent to Pappas 43 percent (UNH Survey Center, August 2026).
The receipts: Jessica Taylor at Cook Political Report shifted New Hampshire from Lean Democrat to Toss Up on September 15, 2026; The Washington Post and The Hill independently reported the same move the same day (Cook Political Report, September 15, 2026; The Washington Post, September 15, 2026; The Hill, September 15, 2026). Inside Elections remains Toss-up from its September 3 package; Sabato remains Leans Democratic (Washington Examiner, September 15, 2026).
7IowaOpen seat, R-held. Rep. Ashley Hinson (R) vs. state Rep. Josh Turek (D)6.2
Cook Political Report moved the open Iowa Senate race from Lean Republican to Toss Up on August 20, 2026, and Sabato's Crystal Ball matched that Toss-up on September 22, 2026, moving it from Leans Republican (Cook Political Report, August 20, 2026; Sabato's Crystal Ball, September 22, 2026; The Hill, September 22, 2026). Inside Elections remains at Tilt Republican. Rep. Ashley Hinson (R) faces state Rep. Josh Turek (D).
The receipts: Sabato's Crystal Ball's September 22, 2026 move from Leans Republican to Toss-up joins Cook's August 20 Toss Up, leaving Inside Elections as the holdout at Tilt Republican (Sabato's Crystal Ball, September 22, 2026; Cook Political Report, August 20, 2026; The Hill, September 22, 2026).
8MichiganOpen seat, D-held. Abdul El-Sayed (D) vs. Rep. Mike Rogers (R)5.9
Sabato's Crystal Ball moved Michigan from Toss-up to Leans Democratic on September 22, 2026, citing the national environment even while noting Abdul El-Sayed may underperform a generic Democrat; Cook Political Report and Inside Elections still rate the open seat a Toss-up (Sabato's Crystal Ball, September 22, 2026; The Hill, September 22, 2026). Epidemiologist Abdul El-Sayed is the Democratic nominee; Rep. Mike Rogers is the Republican nominee (NPR, August 2026).
The receipts: Sabato's Crystal Ball's September 22, 2026 Leans Democratic print is the dated receipt that Michigan is no longer a three-rater Toss-up; Cook and Inside Elections remain at Toss-up (Sabato's Crystal Ball, September 22, 2026; The Hill, September 22, 2026; Cook Political Report, 2026).
9GeorgiaSen. Jon Ossoff (D) vs. Rep. Mike Collins (R)4.8
Cook Political Report moved Georgia from Lean Democrat to Likely Democrat on September 23, 2026, citing Jon Ossoff's cash and profile edge over Rep. Mike Collins; Sabato's Crystal Ball already rated the race Likely Democratic (Cook Political Report, September 23, 2026; Newsweek, September 23, 2026; Sabato's Crystal Ball, 2026). Inside Elections remains more competitive at Tilt Democratic.
The receipts: Cook's September 23, 2026 Likely Democrat print takes Georgia a step further off the flip board after its earlier Lean Democrat move; Sabato was already at Likely Democratic (Cook Political Report, September 23, 2026; Newsweek, September 23, 2026).
10MinnesotaOpen seat, D-held. Lt. Gov. Peggy Flanagan (D) vs. Michele Tafoya (R)3.6
Cook, DDHQ/The Hill, Inside Elections, and Sabato's Crystal Ball rate the general election Likely Democratic as of August 11, 2026 (Ballotpedia, Minnesota Senate 2026). On August 11, Flanagan defeated Rep. Angie Craig 59.0 percent to 39.4 percent in the Democratic primary; Tafoya won the Republican primary with 52.1 percent (NBC News, August 12, 2026; New York Times, August 11, 2026).
The receipts: The open Minnesota seat remains outside the competitive flip band after both nominees locked on August 11: Flanagan won 59.0 percent against Craig's 39.4 percent, and Tafoya took 52.1 percent of the Republican primary (NBC News, Minnesota Senate results, August 12, 2026). Cook and the other major raters keep the general election Likely Democratic in a state Harris carried by 4.3 points in 2024 (Ballotpedia, 2026; Cook Political Report, 2026).
11KansasSen. Roger Marshall (R) vs. Adam Hamilton (D)3.4
Sabato's Crystal Ball moved Kansas from Likely Republican to Leans Republican on September 22, 2026, and Cook Political Report matched with Likely Republican to Lean Republican on September 23, 2026; Inside Elections had already moved the race from Solid to Likely Republican on September 3 (Sabato's Crystal Ball, September 22, 2026; Cook Political Report, September 23, 2026; The Hill, September 22 to 23, 2026). Sen. Roger Marshall (R) faces Adam Hamilton (D).
The receipts: Two major raters now print Lean/Leans Republican for Kansas within 24 hours: Sabato on September 22 and Cook on September 23, after Inside Elections' earlier Likely Republican step (Sabato's Crystal Ball, September 22, 2026; Cook Political Report, September 23, 2026).
12NebraskaSen. Pete Ricketts (R) vs. Dan Osborn (I)3.0
Cook moved Nebraska from Solid Republican to Likely Republican in April 2026 as independent industrial mechanic Dan Osborn, who lost to Deb Fischer by 6.7 points in 2024, mounted a second campaign (Cook Political Report, 2026). No Democrat holds the line, which keeps the race a two-way contest.
The receipts: Cook moved Nebraska from Solid to Likely Republican in April 2026 as independent Dan Osborn, who lost to Deb Fischer by 6.7 points in 2024, ran a second time against appointed Sen. Pete Ricketts (Cook Political Report, 2026). With no Democrat on the ballot, the race remains a two-way contest in a state Trump carried by roughly 20 points.
13Florida (special)Appointed Sen. Ashley Moody (R) vs. Democratic nominee2.6
The special election for the seat Marco Rubio vacated sits in the Likely Republican column at the major raters (270toWin consensus, 2026). Trump carried Florida by 13.1 points in 2024, and Moody enters with statewide wins as attorney general on her record (Cook Political Report, 2026).
The receipts: The Florida special election to fill Marco Rubio's vacated seat sits Likely Republican across the raters, in a state Trump carried by 13.1 points in 2024 (270toWin consensus, 2026). Appointed Sen. Ashley Moody enters with two statewide wins as attorney general, which the raters cite as an incumbency-style advantage (Cook Political Report, 2026).
14KentuckyOpen seat, R-held. Rep. Andy Barr leads the GOP field after Mitch McConnell's retirement2.0
McConnell is not running for the first time since 1984, and the raters keep the general election in their safe Republican columns (Ballotpedia, 2026). The action is in the primary: businessman Nate Morris withdrew in May 2026 and endorsed Barr, who leads former Attorney General Daniel Cameron (Wikipedia, 2026 Kentucky Senate election).
The receipts: Mitch McConnell is not on a Senate ballot for the first time since 1984, but the raters keep his open seat Safe or Solid Republican in a state Trump carried by roughly 30 points (Ballotpedia, 2026). The only real contest is the GOP primary, where Nate Morris withdrew in May 2026 and endorsed Rep. Andy Barr over Daniel Cameron (Wikipedia, 2026 Kentucky Senate election).
15South Carolina (special)Special election for the seat of the late Sen. Lindsey Graham (R). GOP runoff Aug. 25: Darline Graham vs. Ralph Norman; Democrat Annie Andrews already nominated1.8
Cook Political Report moved the South Carolina special from Solid Republican to Likely Republican on September 23, 2026, while still calling the GOP nominee the heavy favorite against Democrat Annie Andrews (Cook Political Report, September 23, 2026; The Hill, September 23, 2026). Sabato's Crystal Ball and Inside Elections remain at Safe or Solid Republican.
The receipts: Cook's September 23, 2026 Likely Republican print is the first major rater to pull South Carolina off Solid/Safe status this cycle (Cook Political Report, September 23, 2026; The Hill, September 23, 2026).
Click any entry to open its full scorecard, sub-scores, and the receipts.
Consensus flip-likelihood score, 15 most competitive Senate races (0-10)
What the raters actually say
Three professional, nonpartisan shops publish race ratings that campaigns, donors, and newsrooms treat as the standard: The Cook Political Report with Amy Walter, Sabato's Crystal Ball at the University of Virginia, and Inside Elections with Nathan L. Gonzales. This ranking aggregates them and names them at every step. As of early July 2026 the raters agree on the top tier. North Carolina sits at Lean Democrat, moved there by Cook on June 11, 2026, and rated Leans Democratic by Sabato's Crystal Ball. Maine, Ohio, Alaska, and Michigan sit at Toss-up across the boards, with Inside Elections completing the set by moving Alaska to Toss-up on July 1, 2026 (Cook Political Report, 2026; Sabato's Crystal Ball, 2026; Inside Elections, 2026).
The framework pays no attention to which party a seat belongs to. Four of the five most flippable seats are Republican-held. The fifth, Michigan, is Democratic-held. The same ruler produced both results. The subscores in the table above show exactly how each entry earned its place: North Carolina carries a Lean toward the challenger party from all three raters plus a seven-point polling edge, while Michigan matches its tossup ratings but has no resolved nominee and therefore no polling component yet.
The math of the majority
There are 35 seats on the ballot, including special elections in Florida, Ohio, and South Carolina, the last created by Sen. Lindsey Graham's death on July 11, 2026. Republicans defend 23 of them. Democrats need a net gain of four seats to take the majority in 2027 (Cook Political Report, 2026). That arithmetic explains why Sabato's Crystal Ball, even after moving North Carolina, Alaska, and Ohio toward Democrats, still writes that it favors Republicans overall: Republicans can block a Democratic majority by winning just one of the Toss-ups (Sabato's Crystal Ball, 2026).
Run the table exercise is simple. If Democrats flip North Carolina and Maine, hold Georgia, Michigan, New Hampshire, and Minnesota, they still need two more from the Ohio, Alaska, Iowa, Texas group. Every one of those four is in a state Trump carried by double digits or near it in 2024. That is the wall between Democrats and 51 seats. The July NYT/Siena polls showed the wall holding: Republican nominees led in Ohio, Alaska, and Iowa, and the tie in Texas came in a state Trump won by nearly 14 points (The Hill/NYT-Siena, 2026).
Recruitment changed the map
Three rating moves this cycle trace directly to candidate entries, not to any change in the national environment. Former Gov. Roy Cooper's July 2025 entry in North Carolina preceded the race's move to Lean Democrat. Former Sen. Sherrod Brown's entry in Ohio preceded that race's move from Lean Republican to Toss Up on June 11, 2026. Former Rep. Mary Peltola's January 2026 entry in Alaska preceded three separate raters moving that race to Toss-up (Cook Political Report, 2026; Inside Elections, 2026; Sabato's Crystal Ball, 2026).
The reverse happened in New Hampshire. Former Sen. John Sununu's entry improved Republican chances in a Democratic-held open seat, by Inside Elections' own published analysis (Inside Elections, 2026). Ratings follow candidates. That is not commentary. It is the documented sequence of events, and it is why the subscore for candidate-driven movement, embedded in each rater's lean, does most of the sorting in the top five.
Primaries produced the surprises
Two nominees on this list were not supposed to be here a year ago. In Texas, Attorney General Ken Paxton defeated Sen. John Cornyn in the Republican primary, and the first post-nomination NYT/Siena poll found Paxton tied 47 to 47 with Democrat James Talarico in a state Trump won by nearly 14 points (The Hill/NYT-Siena, 2026). In Maine, harbormaster Graham Platner overtook Gov. Janet Mills, who suspended her campaign before Platner was nominated with 72 percent, then Platner himself suspended his campaign on July 8, 2026 after a sexual assault allegation he denies, sending the nomination to a July 25 party convention that chose former state Senate president Troy Jackson 566 to 5 (Wikipedia, 2026 Maine Senate election; CNN, July 8, 2026; Maine Public, July 25, 2026). In Georgia, Rep. Mike Collins needed a June 16 runoff and a Trump endorsement to win the nomination with 55.5 percent (Georgia Recorder, 2026).
If the idea of a tied Senate poll in Texas produces discomfort, the discomfort belongs to the reader, not the data. The poll is public, the pollster is named, and the rating still says Likely Republican. Both facts can be true at once, which is why Texas carries a high polling subscore and a low ratings subscore in the table above.
What the July polling adds
The New York Times/Siena College battleground surveys released in the first week of July 2026 tested five of the top races with likely voter samples. Republicans held narrow edges in Ohio (Husted 50, Brown 47), Alaska (Sullivan 47, Peltola 45), and Iowa (Hinson 48, Turek 46). Democrats led in North Carolina (Cooper 50, Whatley 43), and Maine was effectively tied. The Maine picture then changed twice: Platner suspended his campaign on July 8, a July 9 Z to A Research poll found his three likeliest replacements, Shah, Bellows, and Jackson, each within a point of Collins, and on July 25 a nominating convention chose Jackson 566 to 5 (The Hill/NYT-Siena, 2026; NOTUS, July 9, 2026; Maine Public, July 25, 2026).
Single polls do not decide rankings here. They break ties within rating categories, nothing more. The 2024 cycle showed state polls at their most accurate since 1944, and it also showed every miss running in the same direction (AAPOR, 2025). Treat two-point leads accordingly, and read the polling subscore as a tiebreaker inside a rating band, not as a forecast.
The advertising and money tells
Spending confirms where the professionals think the seats are. Maine alone had drawn more than 17 million dollars in advertising by early summer, most of it aimed at defining Susan Collins before the general election (The Hill, 2026). North Carolina, Ohio, and Michigan are the other multi-front air-war states, matching the top of this table. The seats at ranks 12 through 15, Florida, Kentucky, Louisiana, and South Carolina, draw almost no general-election money, which is the market pricing them as safe even where a primary is contested.
The one place money is misleading is the primary. In Texas, a self-financed and well-funded Republican field did not prevent Paxton from beating an incumbent, and the general-election poll now shows a tie. Fundraising is a tell, not a verdict. This ranking uses named ratings and named polls as the receipts; the money is context that happens to point the same direction (The Hill/NYT-Siena, 2026).
July 2026 poll margins in key Senate races, NYT/Siena and (Maine) Z to A Research (negative = Republican lead)
How the map moved from mid-2025 to July 2026
UPDATE (September 22 to 23, 2026): Sabato's Crystal Ball moved Michigan from Toss-up to Leans Democratic, Iowa from Leans Republican to Toss-up, and Kansas from Likely Republican to Leans Republican (Sabato's Crystal Ball, September 22, 2026; The Hill, September 22, 2026). Inside Elections moved Maine from Tilt Republican to Toss-up (Inside Elections via Roll Call, September 22, 2026). Cook Political Report moved Georgia from Lean Democrat to Likely Democrat, Kansas from Likely Republican to Lean Republican, and South Carolina from Solid Republican to Likely Republican (Cook Political Report, September 23, 2026; Newsweek, September 23, 2026; The Hill, September 23, 2026).
UPDATE (September 3 to 4, 2026): Inside Elections shifted four Senate ratings: New Hampshire from Tilt Democratic to Toss-up, Ohio from Tilt Republican to Toss-up, Alaska from Lean Republican to Tilt Republican, and Kansas from Solid Republican to Likely Republican (Inside Elections via X, September 4, 2026; Washington Examiner on New Hampshire, September 4, 2026; 270toWin Inside Elections Senate note, September 2026; Wikipedia predictions tables, September 2026). Kansas remains outside this competitive board. No new Cook or Sabato Senate rating changes fell inside the August 31 to September 6 research window.
UPDATE (August 20 to 26, 2026; prior unpublished stage): Cook moved Texas and Iowa Senate races to Toss Up on August 20, 2026, and Sabato's Crystal Ball moved Texas to Toss-up on August 26, 2026. Those dated prints remain on this board because the live API had not yet absorbed the August 30 stage (Cook Political Report, August 20, 2026; Washington Examiner, August 20, 2026; Sabato's Crystal Ball, August 26, 2026).
UPDATE (August 12, 2026): The August 11 primaries locked nominees without moving the competitive ratings band. In Minnesota, Peggy Flanagan won the Democratic Senate primary 59.0 percent to 39.4 percent over Angie Craig, and Michele Tafoya won the Republican primary with 52.1 percent; Cook and the other major raters still rate the general election Likely Democratic (NBC News, August 12, 2026; Ballotpedia, August 11, 2026). In South Carolina's special Republican primary, Darline Graham led with 32.7 percent and Ralph Norman took 24.6 percent, forcing an August 25 runoff; Cook still rates the seat Solid Republican against Democrat Annie Andrews (New York Times results, August 12, 2026; Cook Political Report, SC Senate 2026). Michigan's Democratic nominee, Abdul El-Sayed, was already set by the August 4 primary against Mike Rogers in a consensus Toss Up (NPR, August 12, 2026).
UPDATE (July 30, 2026): Sabato's Crystal Ball moved Georgia from Leans Democratic to Likely Democratic, the only Senate rating change in the week of July 27, citing incumbent Jon Ossoff's second-quarter fundraising of more than 20 million dollars against about 2 million for Republican Rep. Mike Collins; the move lowers Georgia's consensus flip score from 5.5 to 5.2 and leaves North Carolina as the only 2026 seat any rater places outside the tossup band toward a flip (Sabato's Crystal Ball, July 30, 2026; The Hill, July 30, 2026).
The board's change before that was not a rating but a death. Sen. Lindsey Graham of South Carolina died at his Washington home on the night of July 11, 2026, at age 71, converting his scheduled reelection into a special election (Washington Post, July 12, 2026; NPR, July 12, 2026). Gov. Henry McMaster appointed Darline Graham as interim senator; the August 11 special primary and August 25 runoff now choose the Republican nominee to face Democrat Annie Andrews in November; the seat stays Solid Republican in a state Trump carried by roughly 18 points, so the vacancy changes the mechanism, not the party math (Post and Courier, July 12, 2026; NBC News, August 12, 2026).
The 2026 Senate board looked more favorable to Republicans a year ago than it does now, and every move is documented and dated. When the raters opened the cycle, North Carolina was a Toss Up, Ohio and Alaska were Leans Republican, and Georgia was a Toss Up rated as the Democrats' most exposed incumbent. By July 2026 all four had moved toward the Democrats: North Carolina and Georgia to Lean Democrat, Ohio and Alaska into the Toss-up column (Cook Political Report, 2026; Sabato's Crystal Ball, 2026).
The sequence is candidate-driven and traceable. Sabato's Crystal Ball's June 11, 2026 change moved three seats at once, all toward Democrats: North Carolina to Leans Democratic, and Alaska and Ohio to Toss-up (Sabato's Crystal Ball, 2026). On June 2, the same shop had already moved the open Iowa seat from Likely to Leans Republican after Joni Ernst's retirement. On July 1, Inside Elections completed the Alaska consensus by moving Sullivan to Toss-up. None of these moves reflected a change in the national environment; each followed a recruitment or retirement event.
The countervailing motion for Republicans came through primaries and the map's floor. Ken Paxton's ouster of John Cornyn in Texas turned a Solid Republican hold into a tied summer poll, while Nate Morris's withdrawal in Kentucky settled that primary toward Andy Barr without changing the seat's Safe Republican general rating (Wikipedia, 2026 Kentucky Senate election). The net effect: Democrats improved their odds in the top tier while the structural wall, at least two must-win states Trump carried comfortably, stayed in place. That is why Sabato's Crystal Ball still favors Republicans to hold the chamber even after moving five ratings toward Democrats (Sabato's Crystal Ball, 2026).
On September 8, 2026, New Hampshire locked its open Senate general election as former Sen. John E. Sununu versus Rep. Chris Pappas after decisive primary margins reported by Associated Press and tabulated near 68.5 to 26.7 on the Republican side and 65 to 32.8 on the Democratic side (USA TODAY, September 9, 2026; NBC News, September 8, 2026). That nominee lock does not by itself move Cook or Sabato off Lean Democrat, and Inside Elections already printed Toss Up on September 3 (Washington Examiner, September 4, 2026).
UPDATE (September 2026): Cook Political Report on September 15, 2026 moved New Hampshire's open Senate race from Lean Democrat to Toss Up, a rare Republican-direction Senate shift in an otherwise Democratic-leaning midterm environment (Cook Political Report, September 15, 2026; The Washington Post, September 15, 2026; The Hill, September 15, 2026; Washington Examiner, September 15, 2026). Sabato's Crystal Ball did not republish a matching New Hampshire Senate change inside September 14 to 20; Inside Elections already printed Toss-up on September 3 (Sabato's Crystal Ball, 2026; Inside Elections, September 3, 2026).
Raters placing each top seat in the Toss Up or better column for the challenger party (of 3)
What the evidence settles
The evidence settles the shape of the field. By the published, dated ratings of Cook Political Report, Sabato's Crystal Ball, and Inside Elections, North Carolina is the most likely seat to change parties in 2026, four seats sit at consensus Toss-up (Maine, Ohio, Alaska, Michigan), and Republicans defend more competitive ground than Democrats do. It is also settled that Democrats need a net gain of four seats and that Republicans can block a majority by winning any one of the Toss-ups.
What remains contested
What remains contested is the environment itself. Democrats point to recruitment wins, fundraising leads, and midterm history running against the president's party. Republicans point to the map: every Democratic path runs through at least two states Trump carried comfortably in 2024, and the July NYT/Siena polls still showed Republican nominees ahead in Ohio, Alaska, Iowa, and effectively tied in Texas and Maine. Reasonable people using the same ratings reach different conclusions about the majority, and the raters themselves still favor Republicans to hold it.
Questions people ask
Which Senate seat is most likely to flip in 2026?
North Carolina. It is the only 2026 seat the major raters currently rate to change parties: Cook Political Report moved it to Lean Democrat on June 11, 2026, and Sabato's Crystal Ball rates it Leans Democratic. Former Gov. Roy Cooper led Michael Whatley 50 to 43 in the July 2026 NYT/Siena poll.
Can Democrats win the Senate in 2026?
The path exists but is narrow. Democrats need a net gain of four seats. Even sweeping North Carolina and Maine, they would need two wins from the Toss-up group of Ohio, Alaska, and Michigan while holding Georgia, New Hampshire, and Minnesota. Sabato's Crystal Ball still favors Republicans to hold the majority.
How many 2026 Senate races are rated Toss-up?
Four seats sit at consensus Toss-up as of early July 2026: Maine, Ohio (special), Alaska, and Michigan. Cook, Sabato's Crystal Ball, and Inside Elections each rate Michigan and Alaska Toss-ups, and Cook and Sabato rate Maine and Ohio Toss-ups.
Who rates Senate races, and are they partisan?
The three standard raters are The Cook Political Report with Amy Walter, Sabato's Crystal Ball at the University of Virginia Center for Politics, and Inside Elections with Nathan L. Gonzales. All three are nonpartisan subscription publications whose ratings are used across the political spectrum.
Why is Texas on the list if it is rated Likely Republican?
Because the polling and the rating disagree, and this ranking shows both. Ken Paxton beat incumbent Sen. John Cornyn in the Republican primary, and the July 2026 NYT/Siena poll found Paxton tied 47 to 47 with Democrat James Talarico in a state Trump won by nearly 14 points. The raters still list it Likely Republican; the tie is why it appears here.
Did any race move toward Republicans in 2026?
The clearest example is New Hampshire, where Inside Elections wrote that former Sen. John Sununu's entry boosted Republican chances in a Democratic-held open seat, though the rating stayed Lean Democratic. Kentucky's primary also consolidated toward Andy Barr, but that seat's general election remained Safe Republican throughout.
Sources
- The Cook Political Report with Amy Walter, 2026 Senate Race Ratings https://www.cookpolitical.com/ratings/senate-race-ratings
- Sabato's Crystal Ball, 2026 Senate ratings, University of Virginia Center for Politics https://centerforpolitics.org/crystalball/2026-senate/
- Inside Elections with Nathan L. Gonzales, Senate Ratings https://insideelections.com/ratings/senate
- 270toWin, Consensus 2026 U.S. Senate Forecast (Cook, Sabato, Inside Elections composite) https://www.270towin.com/2026-senate-election/consensus-2026-senate-forecast
- Sabato's Crystal Ball, The Senate: A Couple of Rating Changes in Favor of Democrats, 2026 https://centerforpolitics.org/crystalball/the-senate-a-couple-of-rating-changes-in-favor-of-democrats-but-republicans-still-favored-overall/
- Sabato's Crystal Ball, 2026 Rating Changes log https://centerforpolitics.org/crystalball/2026-rating-changes/
- The Hill, Ossoff reelection bid, 5 House seats move toward Democrats: Sabato's Crystal Ball, July 30, 2026 https://thehill.com/homenews/campaign/5999066-ossoff-georgia-sabatos-crystal-ball-uva/
- CNN Politics, The 9 Senate seats most likely to flip in 2026, July 2, 2026 https://www.cnn.com/2026/07/02/politics/senate-race-rankings-july-2026
- NC Newsline, North Carolina's Senate race no longer a toss-up, top forecasters say, with Cooper in the lead, June 11, 2026 https://ncnewsline.com/2026/06/11/north-carolinas-senate-race-no-longer-a-toss-up-top-forecasters-say-with-cooper-in-the-lead/
- The Hill, GOP holds edge in Senate swing-state races: New York Times polls, July 2026 https://thehill.com/homenews/campaign/5949463-texas-maine-iowa-ohio-alaska-senate-races/
- The Hill, Senate battle heats up: Five seats likely to flip in midterms, 2026 https://thehill.com/homenews/senate/5948254-senate-battle-seats-flip/
- Georgia Recorder, Georgia U.S. Senate race continues with Collins, Dooley runoff on GOP side, 2026 https://georgiarecorder.com/2026/05/20/georgia-u-s-senate-race-continues-with-collins-dooley-runoff-on-gop-side/
- Inside Elections, New Hampshire Senate: Sununu Bid Boosts Republican Chances, 2026 https://insideelections.com/news/article/new-hampshire-senate-rating-sununu-pappas-brown-shaheen
- Minnesota Reformer, Peggy Flanagan wins DFL endorsement for U.S. Senate seat, May 30, 2026 https://minnesotareformer.com/2026/05/30/lt-gov-peggy-flanagan-wins-dfl-endorsement-for-u-s-senate-seat/
- NBC News, Minnesota Senate Primary Election 2026 Live Results (Flanagan 59.0%, Tafoya 52.1%), August 12, 2026 https://www.nbcnews.com/politics/2026-primary-elections/minnesota-senate-results
- NBC News, South Carolina Senate Primary Special Results 2026 (Graham 32.7%, Norman 24.6%), August 12, 2026 https://www.nbcnews.com/politics/2026-primary-special-elections/south-carolina-senate-results
- New York Times, Peggy Flanagan wins Minnesota Democratic Senate primary, August 11, 2026 https://www.nytimes.com/2026/08/11/us/politics/minnesota-democratic-senate-primary-flanagan-craig.html
- NPR, Four takeaways from Tuesday's primaries in six states, August 12, 2026 https://www.npr.org/2026/08/12/nx-s1-5928112/four-takeaways-primaries-six-states
- UMass Lowell Center for Public Opinion, Maine Senate poll, June 2026 https://www.uml.edu/news/press-releases/2026/06042026-maine-senate-poll.aspx
- Ballotpedia, U.S. Senate battlegrounds, 2026 https://ballotpedia.org/U.S._Senate_battlegrounds,_2026
- CNN Politics, Graham Platner drops out of Maine Senate race, July 8, 2026 https://www.cnn.com/2026/07/08/politics/graham-platner-drops-out-maine-senate
- NBC News, Graham Platner drops Senate bid, allowing Maine Democrats to replace him, July 8, 2026 https://www.nbcnews.com/politics/2026-election/graham-platner-drops-senate-bid-maine-rcna353199
- NOTUS, A New Poll Shows a Tight Fight for Platner Replacements, July 9, 2026 https://www.notus.org/2026-election/platner-replacements-poll-maine-senate
- Maine Public, Troy Jackson wins the Democratic nomination to challenge Sen. Susan Collins, July 25, 2026 https://www.mainepublic.org/politics/2026-07-25/troy-jackson-wins-the-democratic-nomination-to-challenge-sen-susan-collins
- CNBC, Maine Democratic delegates choose Troy Jackson as new nominee to face U.S. Sen. Susan Collins, July 25, 2026 https://www.cnbc.com/2026/07/25/maine-democrats-are-meeting-to-pick-a-new-senate-nominee.html
- The Washington Post, Lindsey Graham, longtime South Carolina senator, dies at 71, July 12, 2026 https://www.washingtonpost.com/politics/2026/07/12/lindsey-graham-longtime-south-carolina-senator-dies-71/
- NPR, Sen. Lindsey Graham of South Carolina, Trump ally, dies at 71, July 12, 2026 https://www.npr.org/2026/07/12/nx-s1-5890790/us-sen-lindsey-graham-dies
- The Post and Courier, Gov. McMaster can fill Lindsey Graham's US Senate seat, but there will also be a special primary, July 12, 2026 https://www.postandcourier.com/politics/gov-mcmaster-can-fill-lindsey-graham-s-us-senate-seat-but-there-will-also-be/article_1258186f-43d1-4dac-9fb9-159f66ed3318.html
- CNN Politics, Lindsey Graham's death will shake the Senate, and the November election, July 12, 2026 https://www.cnn.com/2026/07/12/politics/lindsey-graham-replacement-senate
- Washington Examiner, Inside Elections shifts New Hampshire Senate race to toss-up, September 4, 2026 https://www.washingtonexaminer.com/news/campaigns/congressional/4713580/inside-elections-shifts-new-hampshire-senate-race-toss-up-john-sununu/
- Inside Elections on X, Senate and governor rating shifts, September 4, 2026 https://x.com/InsideElections
Parker, T. E. (2026). The 2026 Senate Races Ranked by Flip Likelihood. US Political Rank. https://uspoliticalrank.com/rankings/senate-races-2026<iframe src="https://uspoliticalrank.com/embed/senate-races-2026" width="100%" height="520" style="border:1px solid #ddd;border-radius:8px" title="The 2026 Senate Races Ranked by Flip Likelihood" loading="lazy"></iframe>Keep reading
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