Republicans enter the 2026 midterms holding a narrow House majority of roughly 218 seats amid a historically challenging environment for the president's party. Trader pricing across seat ranges remains tightly clustered because generic ballot polling shows only a modest Democratic edge, dozens of competitive districts exist in both parties' hands, and mid-decade redistricting in states such as Texas has produced offsetting map changes. Elevated Republican retirements and the narrow path to retaining or expanding the majority keep probabilities dispersed, while upcoming September and October polling releases plus any late-cycle economic or foreign-policy shifts could quickly widen or narrow the favored bins.