Midterms 2026: What the Data Says Four Months Out

The map: what is actually up in November

Start with the arithmetic. Thirty-five Senate seats are on the ballot in 2026, including special elections in Florida and Ohio. Republicans hold 23 of the 35. Democrats need a net gain of four seats to take control in 2027 (Cook Political Report, 2026 Senate race ratings). In the House, all 435 seats are up, and Republicans defend a narrow majority. The exposure is asymmetric: the party defending more competitive ground has more ways to lose, and this cycle that party is the Republicans in the Senate seat count, though the specific seats in play still favor a Republican hold, as both major raters note below.

What the raters say, by name

We aggregate race ratings only with attribution. Cook Political Report moved the Alaska Senate race from Lean Republican to Toss Up on July 1, 2026, after earlier June moves that shifted Ohio from Lean Republican to Toss Up and North Carolina from Toss Up to Lean Democratic (Cook Political Report, Senate race ratings, July 2026). Sabato's Crystal Ball made parallel moves on June 11, 2026: Dan Sullivan of Alaska to Toss Up, Jon Husted of Ohio to Toss Up, and the open North Carolina seat of retiring Senator Thom Tillis to Leans Democratic (Sabato's Crystal Ball, 2026 rating changes).

Both raters reach the same headline conclusion. Republicans remain favored to hold the Senate majority despite a difficult national environment, because Democrats must sweep the toss-ups and then break into territory currently rated Republican to reach a net gain of four (Sabato's Crystal Ball, The Race for the Majority is Not a Toss-up, 2026). In the House, Cook's June moves ran in one direction: four Republican seats from Safe to Likely Republican and three more from Likely to Lean Republican (Cook Political Report, House race ratings, June 18, 2026). Ratings drifting toward the president's opposition in both chambers is the classic midterm signature.

The two numbers that predict midterms

Decades of results reduce midterm forecasting to two indicators: presidential approval and the generic congressional ballot. Both currently point the same direction. Marist's June 2026 poll measured President Trump's approval at 36 percent, his second-term low in that survey (Marist Poll, June 2026), and averages across pollsters have run in the high 30s (Wikipedia, Opinion polling on the second Trump presidency, accessed July 2026). On the generic ballot, Morning Consult's early June tracking showed Democrats ahead 46 percent to 42 percent among registered voters (Morning Consult, June 2026), and other surveys have shown wider leads (Data for Progress, May 2026).

Approval is the stronger of the two signals. Gallup's historical analysis found that presidents with approval below 50 percent at midterm time saw their party lose an average of 37 House seats, against an average of 14 for presidents above 50 percent (Gallup, Midterm Seat Loss Averages 37 for Unpopular Presidents, 2018). No president in the modern polling era has been at 36 percent in June of a midterm year and watched his party have a good November.

Eighty years of gravity

The historical baseline comes from The American Presidency Project's compilation of seats gained or lost by the president's party in every midterm (The American Presidency Project, Seats in Congress Gained/Lost by the President's Party in Mid-Term Elections). Since 1946, the president's party has lost House seats in all but a handful of midterms, with an average loss of roughly 25 seats across the full period (The American Presidency Project; Gallup, 2018). The exceptions are instructive because they are so few: 1998, under a president near 66 percent approval, and 2002, in the year after the September 11 attacks. Absent an unusual rally, the gravity holds.

The recent record shows the range. The president's party lost 54 House seats in 1994, 63 in 2010, 40 in 2018, and just 9 in 2022, when redistricting and candidate quality compressed the swing (The American Presidency Project). The 2022 case is the caution against overconfidence: a bad environment sets the direction of the wind, but district lines and specific candidates set how far anything actually moves.

What would change this picture

The data says the environment favors Democrats and the structure favors Republicans holding the Senate. Between now and November, three things could move the picture. First, the Supreme Court's June 30 ruling in NRSC v. FEC removed limits on coordinated party spending, a structural change whose effects will show up first in third quarter fundraising and spending reports (Supreme Court of the United States, NRSC v. FEC, No. 24-621, June 30, 2026). Second, approval itself can move; midterm history is keyed to approval at election time, not in July. Third, nominations are not finished. Colorado's June 30 primaries removed a sitting senator and a 15-term House incumbent from their respective ballot lines (NBC News, Colorado primary results, June 30, 2026), and primaries through September will keep resetting individual races.

We will re-run this analysis as the named raters update. The record so far: every rating change from Cook and Sabato since spring has moved toward Democrats, the two predictive numbers sit where midterm losses for the president's party have historically been large, and the Senate math still requires Democrats to win nearly everything close. All three of those statements are documented. None of them is a prediction.