The rematch between Republican incumbent Mariannette Miller-Meeks and Democrat Christina Bohannan in Iowa’s 1st Congressional District remains highly competitive, with recent polling averages showing a narrow Democratic edge of roughly 3 points and forecasters rating the seat a toss-up. Miller-Meeks’s prior narrow victories, strong constituent service, and physician background have sustained Republican support in a district blending rural areas with the more Democratic-leaning Iowa City and Quad Cities suburbs. National factors including midterm dynamics, consumer prices, and foreign policy developments continue to influence voter sentiment, while both candidates have raised comparable funds and face limited primary pressure. These elements sustain tight implied probabilities across margin buckets, with separation likely hinging on turnout in swing precincts, late-cycle advertising, or shifts in the broader political environment before November 3.