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U.S. Senator · South Dakota
Mike Rounds
RepublicanState R+15119th CongressOn the ballot 2026
Typical swing score67#14 of 100 senators across tracked bills
Contact Mike Rounds’s office
Official D.C. office details from the congress-legislators datasetWashington, D.C. office716 Hart Senate Office Building Washington DC 20510
Model
Directional: count only breaks toward the other partyWhy do scores change?v3default (selected)v2 model swing-v2
Signals to watch
What in this member’s state, record and ideology could move them, and in which direction. Their score is the same on every bill they haven’t committed to, so these are the things to watch.Could pull them toward Democrats · 3 signals
- StrongBacks 6 Democratic-led tracked billsSponsor or active cosponsor of 6 of the 865 tracked bills that were introduced by Democrats: S. 237, S. 315, S. 390, S. 567, S. 610 and 1 more.
- Medium4th most moderate of 53 Senate RepublicansDW-NOMINATE +0.354 vs. the Senate Republican median of +0.558: 0.204 toward the Democrats (rank 4 of 53 by distance toward the Democrats).
- WeakHeritage Action 79 vs. Senate Republican avg 88Heritage Action (119th Congress, higher = more conservative) scored this member 79; the Senate Republican average is 88.1 (n=53). That is 9 points toward the Democrats.
Keeps them with Republicans · 2 signals
- Medium
Term and election
From the congress-legislators datasetOn the ballot 2026
- Current term
- January 3, 2021 – January 3, 2027
- Senate class
- Class 2
- Seniority
- Junior senator
- Next election
- November 3, 2026
- Years in office
- 11.8 years
Committees
Seats on a bill’s committee of referral add a in swing-v3- Commission on Security and Cooperation in EuropeMajority · 4th in seniority
- Senate Committee on AppropriationsMajority · 13th in seniority
- Subcommittee on Agriculture, Rural Development, Food and Drug Administration, and Related Agencies
- Subcommittee on Legislative Branch
- Subcommittee on Department of Interior, Environment, and Related Agencies
- Subcommittee on Departments of Labor, Health and Human Services, and Education, and Related Agencies
Voting ideology
first dimension, from VoteviewR median
D median
Rounds← More liberal (−1)More conservative (+1) →
Their score of +0.354 is 0.20 to the left of the Senate Republican median (+0.558).
Advocacy scorecards
Their rating vs. the Senate Republican average- 119th Congress79Senate Republican average: 88 (n=53)
Swing score by bill
swing-v3, directional · a bill marks a member as committed to itShowing 1–50 of 845 tracked bills, best swing first
| Bill | Their role | Swing score · | |
|---|---|---|---|
| H.R. 4Rescissions Act of 2025Summary on Congress.gov | No position yetNow in the House | 79
| Swing |
| H.R. 3944Military Construction and Veterans Affairs, Agriculture, and Legislative Branch Appropriations Act, 2026 |