Iowa’s 1st congressional district remains one of the closest House races heading into the November 3 general election, with Democrat Christina Bohannan and Republican incumbent Mariannette Miller-Meeks locked in a rematch of their 2024 contest. Recent polling averages show Bohannan ahead by roughly four points among likely voters, while nonpartisan forecasters have shifted ratings from toss-up to lean Democratic. Both candidates have raised comparable funds exceeding $7 million, and an independent candidate adds a small but notable share. The district’s narrow partisan balance, combined with competitive statewide races for governor and Senate, sustains expectations of a single-digit margin. An October 20 debate and final weeks of advertising on tariffs, crime, and national conditions could widen or narrow the gap before Election Day.