Dusty Johnson

In the 2018 House race for SD-00, Dustin Dusty Johnson (R) won with 60.4% of the vote, defeating Tim Bjorkman (D) who received 36.0%. 2 additional candidates split the remaining vote. Dustin Dusty Johnson's 24.3-point advantage over the runner-up confirmed a comfortable win.

This was an open-seat race with no incumbent running — Kristi L. Noem (R) previously held the seat. Open seats typically attract stronger candidates and heavier spending from both parties. As a Republican, Dustin Dusty Johnson won despite the historical midterm penalty against the president's party (Republican Trump was in office).