Democrat Mitchell Berman defeated Republican incumbent Bryan Steil in Wisconsin’s 1st congressional district on November 3, 2026, by roughly 4 percentage points according to certified tallies. This outcome aligned with pre-election polling that showed a tightening contest and reflected a broader Democratic performance across battleground House seats amid national voter sentiment. Berman, an emergency room nurse, emphasized health care experience and outsider appeal in a district that shifted left from its 2024 presidential baseline. Steil, who had held the seat since 2019, outraised his opponent but faced headwinds from fundraising disparities in outside spending and the district’s suburban and working-class dynamics. Late vote counting and county-level shifts in Kenosha and Racine solidified the 3-6% range, with limited remaining ballots unlikely to alter the certified margin.