Cook Moves OH-10, OH-15, and CO-03 From Solid to Likely Republican

What moved on August 13

The Cook Political Report on August 13 moved three Republican held House districts from Solid Republican to Likely Republican: Ohio's 10th (Rep. Mike Turner), Ohio's 15th (Rep. Mike Carey), and Colorado's 3rd (Rep. Jeff Hurd) (Cook Political Report, August 13, 2026; 270toWin Cook House ratings table, as of August 13, 2026). The analysis, by Erin Covey, cites state level dynamics that raise the risk for those incumbents without placing any of the three into the Toss Up column (Cook Political Report, "Three Republican Incumbents Move From Solid to Likely Republican," August 13, 2026).

That is a one notch shift on Cook's seven point scale. It is not a flip call. It is a published signal that seats previously treated as locked now require more attention from the independent rating desk that newsrooms and campaigns watch most closely.

The Buckeye pair and the Colorado seat

In Ohio, Cook links the OH-10 and OH-15 moves to the probability that Sen. Sherrod Brown and Democratic gubernatorial nominee Amy Acton will carry both districts in November, creating a harder environment for Turner and Carey even though both remain favored to hold (Cook Political Report, August 13, 2026). Turner has represented the Dayton area seat since 2003. Carey has held the Columbus area 15th since 2021. Cook still labels both Likely Republican, not Toss Up.

In Colorado, Cook moves CO-03 for Hurd after citing a difficult Republican gubernatorial environment at the top of the ticket (Cook Political Report, August 13, 2026). Hurd won the Western Slope and Pueblo based seat in 2024. The seat is still rated for the Republican. The rating simply no longer says Solid.

What the board looks like after the move

Cook's House summary immediately before this shift, dated August 10, listed 184 Solid Democratic seats, 185 Solid Republican seats, 11 Likely Democratic, 17 Likely Republican, 10 Lean Democratic, 9 Lean Republican, and 19 Toss Ups (Cook Political Report House ratings, August 10, 2026; 270toWin mirror). Moving three seats from Solid Republican into Likely Republican leaves Solid Republican at 182 and Likely Republican at 20, with Toss Ups still at 19.

That math matters for how readers use the board. The majority is decided inside the competitive band: Toss Ups plus Lean seats on both sides. Solid to Likely moves widen the watch list without rewriting the 19 seat Toss Up count that US Political Rank tracks in its ranking of the 20 most competitive House districts of 2026. A full House majority is still 218 of 435 seats. The Clerk still lists four vacancies, with a live party count near 218 Republicans, 212 Democrats, one independent, and four empty chairs (Clerk of the House; House Press Gallery Party Breakdown).

Calendar next to the ratings

The rating change lands four days before California's 14th District special general election on August 18, and eleven days before the August 25 South Carolina Senate runoff and Georgia 13th special runoff (Ballotpedia, special elections to the 119th Congress; California Secretary of State CD-14 calendar). Those contests refill seats or finish nominations. They do not, by themselves, rewrite Cook's Toss Up list.

The same week, The Hill tallied a dozen congressional incumbents who have already lost 2026 primaries: two senators and ten House members, including seven Democrats and three Republicans in the House plus Sens. Bill Cassidy and John Cornyn earlier in the cycle (The Hill, August 13, 2026). Primary losses change who appears on the November ballot in safe seats more often than they change majority math. The Cook moves change how independent analysts grade three seats that still favor Republicans.

What this settles and what it does not

August 13 settles one published fact: Cook no longer calls OH-10, OH-15, or CO-03 Solid Republican. It does not settle the House majority. It does not place those three seats among the 19 Toss Ups. It does not change the four vacant chairs waiting on state calendars.

Read the full board and the American system is still doing ordinary midterm work on a fixed schedule. Independent raters publish named moves with dates. Special elections refill empty seats. Primaries replace nominees when voters choose someone else. November 3 is 81 days from August 14. Watch whether Cook or other raters move any of the three seats again, watch the Toss Up count for any further changes, and watch the specials already printed for August 18 and August 25. The count that decides the 120th Congress is still taken on Election Day.