| Candidate(s) | % | Votes | |
|---|---|---|---|
| Thune Incumbent | % |
ahead
|
|
| Whalen | % |
ahead
|
|
| Mowry | % |
ahead
|
CNN projects Sen. John Thune will be the Republican nominee as he seeks a fourth term. Democrats did not have a primary. Military veteran and former college professor Brian Bengs is the Democratic nominee.