Republicans enter the final three weeks of the 2026 midterm campaign defending a narrow House majority amid consistent Democratic advantages on the generic ballot and in race ratings from forecasters such as Cook Political Report. Multiple competitive districts have shifted toward Democrats in recent updates, reflecting voter sentiment that favors the opposition party in a midterm environment. Redistricting gains secured by Republicans earlier have not offset these trends, leaving the party with limited paths to retain control on November 3. Prediction market pricing for Republican House retention remains in the low double digits, and with Election Day approaching, further movement in those odds would require substantial shifts in polling aggregates or late-breaking developments capable of altering turnout expectations in key battlegrounds.