**Marcy Kaptur’s long incumbency since 1982, substantial fundraising edge, and established voter base in northwest Ohio continue to anchor trader expectations in the OH-09 race.** The mid-decade redistricting approved in 2026 shifted the district lines to favor Republicans more clearly, with analyses showing a Trump margin of roughly 10–11 points under the new boundaries compared with the narrower contest in 2024. Derek Merrin, the Republican nominee who fell short by less than one point last cycle, benefits from the map change, Trump’s endorsement, and attacks on Kaptur’s tenure, yet trails significantly in cash on hand. Forecasters rate the seat a toss-up or lean Democratic, and recent polling shows tight margins. Early voting has begun, with the November 3 outcome likely hinging on turnout among union households and suburban voters along Lake Erie.