Marion Michael (Mike) Rounds

Senator from South Dakota

SENATEREPUBLICAN2015–nowID R000605

LegislationHEADLINE

7%with Dems

of 1,326 votes

Nominations

13%with Dems

of 1,653 · confirmations only

All contested

11%with Dems

of 2,979 · both combined

Steepest move

−15 pts

2023 → 2025

still a Republican

Career arc

Legislation leads. Each point is one Congress: how often they sided with the Democratic majority on contested bills, resolutions and amendments.

100%75%50%25%0%sides with Democrats ↑sides with Republicans ↓20152021

2025–26119th Congress

Sat as a Republican

2%with Democrats

legislation only

Votes for this Congress are open below

Steepest move: 2023 → 2025, −15 pts — within one party label.

Sat as a DemocratSat as a RepublicanVotes available below

Votes

DateBillVoteTypeCastSided with

Sep 30, 2026noneKeith Sonderling, of Florida, to be Secretary of LaborNOMINATIONYEAREP MAJORITY

Sep 30, 2026H.R. 9340A bill to amend the Public Utility Regulatory Policies Act of 1978 to establish a Federal standard relating to the recovery of the full, incremental costs of upgrades that serve large-load customers, and for other purposes.LEGISLATIONYEAREP MAJORITY

Full textA bill to amend the Public Utility Regulatory Policies Act of 1978 to establish a Federal standard relating to the recovery of the full, incremental costs of upgrades that serve large-load customers, and for other purposes.Party majoritiesDemocrats Nay · Republicans YeaCounts toward scoreYes — the parties split.

Where this lands

YEASided with the Republican majority

Open roll call

Sep 30, 2026H.R. 7008A bill to amend chapter 131 of title 5 to require certain restrictions on stocks for Members of Congress and their spouses and dependents, and for other purposes.LEGISLATIONYEAREP MAJORITY

Sep 29, 2026S.Res. 852A resolution requesting information on Israel's human rights practices pursuant to section 502B(c) of the Foreign Assistance Act of 1961.LEGISLATIONNAYREP MAJORITY

Sep 29, 2026S.J.Res. 197A joint resolution providing for congressional disapproval under chapter 8 of title 5, United States Code, of the rule submitted by the Centers for Medicare & Medicaid Services of the Department of Health and Human Services relating to "Patient Protection and Affordable Care Act, HHS Notice of Benefit and Payment Parameters for 2027; and Basic Health Program".LEGISLATIONNAYREP MAJORITY

Sep 28, 2026S. 4668A bill to protect the name, image, and likeness rights of, and provide protections for, student athletes and to promote fair competition among intercollegiate athletics, and for other purposes.LEGISLATIONYEABOTH · NOT SCORED

Sep 28, 2026S. 4668To establish certain standards with respect to coaches of varsity sports teams.LEGISLATIONNAYREP MAJORITY

Sep 28, 2026S. 4668To increase the limitation on funding for post-eligibility insurance and catastrophic injury for student athletes.LEGISLATIONNAYREP MAJORITY

9 most recent roll calls shown · 833 contested votes scored in the 119th CongressAll votes this Congress →

By policy area

career · legislation

Economics and Public Finance9.2% · 541 votes

International Affairs0% · 87 votes

Energy9.8% · 82 votes

Armed Forces and National Security10.6% · 66 votes

Health3.4% · 58 votes

Congress0% · 45 votes

Immigration0% · 45 votes

Taxation2.2% · 45 votes

Science, Technology, Communications28.6% · 42 votes

Environmental Protection2.5% · 40 votes

Finance and Financial Sector0% · 37 votes

Transportation and Public Works8.1% · 37 votes

Crime and Law Enforcement3% · 33 votes

Education7.1% · 28 votes

Government Operations and Politics4% · 25 votes

Public Lands and Natural Resources12% · 25 votes

Emergency Management26.3% · 19 votes

Labor and Employment5.3% · 19 votes

Too few contested votes to score

Civil Rights and Liberties, Minority Issues— · 9 votes

Foreign Trade and International Finance— · 9 votes

Agriculture and Food— · 8 votes

Social Welfare— · 6 votes

Commerce— · 4 votes

Sports and Recreation— · 4 votes

Animals— · 2 votes

Families— · 1 vote

Law— · 1 vote

They also voted in 2 areas where the parties never split, so there is nothing to score — never on a contested question: Housing and Community Development, Water Resources Development.

Blue is the share of votes siding with the Democratic majority; the tick marks 50%.

Service record

6 Congresses

114th · 2015119th · 2025

Republican · Senate · SD114th–119th

Term datesexact

Marion Michael (Mike) Rounds

Senator from South Dakota

SENATER2015–now6 CONGRESSES

Compare

LegislationHEADLINE

7.5%with Democrats

of 1,326 votes · 92.5% with Republicans

Nominations13%of 1,653 votes

All contested11%of 2,979 · combined

Steepest move−15 pts2023→25, as a Republican

Career arc

10050020152025

2025–26 · 119th · Republican2%

Legislation leads. Tap a point to read that Congress.

Votes

Democratic majorityNay

Republican majorityYea

Counts toward scoreYes

Open roll call

Latest 6 shown · 833 contested votes scored in the 119th

By policy area

career

Economics and Public Finance9.2% · 541

International Affairs0% · 87

Energy9.8% · 82

Armed Forces and National Security10.6% · 66

Health3.4% · 58

Congress0% · 45

Immigration0% · 45

Taxation2.2% · 45

Science, Technology, Communications28.6% · 42

Environmental Protection2.5% · 40

Finance and Financial Sector0% · 37

Transportation and Public Works8.1% · 37

Crime and Law Enforcement3% · 33

Education7.1% · 28

Government Operations and Politics4% · 25

Public Lands and Natural Resources12% · 25

Emergency Management26.3% · 19

Labor and Employment5.3% · 19

Civil Rights and Liberties, Minority Issues— · 9

Foreign Trade and International Finance— · 9

Agriculture and Food— · 8

Social Welfare— · 6

Commerce— · 4

Sports and Recreation— · 4

Animals— · 2

Families— · 1

Law— · 1

Also voted in 2 areas where the parties never split — never on a contested question: Housing and Community Development, Water Resources Development.

Service record

114th · 2015119th · 2025

Republican114th–119th

Party switchers

John Alexander LoganD→R · IL · 40th Wesley Wade WatkinsD→R · OK · 105th Ben Nighthorse CampbellD→R · CO · 104th