Robert F. Onder, Jr.

In the 2024 House race for MO-3, Bob Onder (R) won with 61.3% of the vote, defeating Bethany E. Mann (D) who received 35.3%. 2 additional candidates split the remaining vote. Bob Onder's 26.0-point advantage over the runner-up confirmed a comfortable win.

This was an open-seat race with no incumbent running — Blaine Luetkemeyer (R) previously held the seat. Open seats typically attract stronger candidates and heavier spending from both parties. The 2024 presidential election drove higher voter turnout, which can help or hurt down-ballot candidates depending on the top of the ticket. The wide margin suggests this district is firmly in the Republican column for the foreseeable future.