Mike Rounds

U.S. Senator · South Dakota · Republican

From public records: votes from Voteview, bills from congress.gov, money from FEC filings · votes updated Nov 9, 2026 · How we measure

Effectiveness, 119th Congress so far

How it’s measured

0.65· expected 1.04

Meets expectations

Rank 58 of 100 in the Senate · expected = average of 32 majority-party members without a committee lead

How far Rounds’s own bills got, weighted by substance. The average member scores 1.00.

63 bills and joint resolutions sponsored: 0 significant (got a roll call vote), 63 substantive, 0 commemorative. Compare the Senate

Became law inside another bill (1)

S. 105 Wounded Knee Massacre Memorial and Sacred Site ActIdentical bill became law as H.R. 165 · Dec 19, 2025Via H.R. 165

Rounds’s own bill stalled, but the Congressional Research Service lists an identical bill, or one with similar text, that became law. Shown for context; not counted in the score, which follows the Center for Effective Lawmaking. How this works

How Rounds’s ratings compare with every senator

Ratings, 119th Congress

Scores run 0–100 and always sit next to a median. Each tick is one senator; the ringed marker is Rounds.

Rounds in plain answers: party votes, bipartisanship, who votes alike

Attendance

How it’s measured

99/ 100

Chamber median 98 · 8 missed of 915

Voted on 907 of 915 roll calls; missed 8. Higher than 83% of senators.

85%100%

Party loyalty

How it’s measured

99/ 100

Senate R median 100 · Rank 41 of 53

Sided with the Republican majority on 832 votes that split the parties. Lower than 51% of senators.

75%100%

Bipartisan

How it’s measured

9/ 100

Chamber median 9 · +0

Average agreement with members of the other party on contested votes. Higher than 68% of senators.

0%30%

Position

How it’s measured

+0.35

Republican middle 80%: 0.38 to 0.78

Left–right position from roll-call similarity (DW-NOMINATE, Voteview), from −1 to +1. Members who vote alike sit near each other.

LiberalConservative

Rounds’s bills that passed the Senate or further

All bills

2 bills and joint resolutions sponsored in the 119th Congress, furthest along first. These are the bills counted in Rounds’s effectiveness score.

S. 1055 Indian Health Service Emergency Claims Parity ActRequires Indian Health Service to process emergency claims with same timeline as other claims. AI-readNative Americans · Introduced Oct 5, 2026Substantive124 words Introduced
S. 1473 Stop Stealing our Chips ActEstablishes whistleblower incentive program and protections for reporting export control violations to the Commerce Department. AI-readForeign Trade and International Finance · Introduced May 21, 2026SubstantiveText pending Introduced

Stage comes from each bill’s latest action on congress.gov; the full history is on each bill page.