Traders assign the highest probability to Republican House totals falling below 190 seats after the 2026 midterms, consistent with historical patterns where the president's party typically loses ground amid midterm turnout dynamics and voter sentiment on economic conditions. Probabilities cluster most heavily in the 190-204 range, underscoring how factors such as generic ballot trends, candidate recruitment success in competitive districts, and the final shape of redistricting maps could consolidate support behind specific seat totals. Primary differentiators include legislative outcomes in the current Congress, approval trends for the administration, and any shifts in key voting blocs ahead of primaries. Scheduled primary contests through the summer and fall remain the next major catalysts likely to influence these assessments.