South Dakota delegation in Congress
| Member | With party | With President | Rank (0–100) |
|---|---|---|---|
| Sen. Mike RoundsRepublican South Dakota | 99% | 100% | 56 |
| Sen. John ThuneRepublican South Dakota | 98% | 100% | 63 |
| Rep. Dusty JohnsonRepublican South Dakota | 99% | 100% | 69 |
Rank is the percentile in all of Congress from most liberal (0) to most conservative (100).