Oathstar

U.S. Senator from South Dakota · Class III

John Thune

Republican 4th term Up 2028
98LoyaltyMed 100
100AttendMed 98
11BipartMed 9
19BreaksMed 2

Position · +0.43

LEFTD · R RANGESRIGHT
In office
Senate 2005–now
House 1997–2003
27 years in CongressMore senior than 86% of the Senate
Breaks on
Armed Forces and National Security 10% · Government Operations and Politics 8%
Committees
Agriculture, Nutrition, and Forestry · Commerce, Science, and Transportation · Finance
Bills on
Congress · Agriculture and Food · Taxation
Age
65

Where Thune has influence

Roles

Talks most about

  • Government Operations and Politics 6 statementsSupports congressional stock purchase ban and voter ID measures
  • Health 1 statementAnnounced $50 billion rural health care provider investment program
  • Taxation 1 statementPraised Working Families Tax Cuts benefiting small businesses

Stories in Thune’s press releases with their latest stance, last three months. Read by AI.

Where Thune breaks with Republicans

Method

Share of party-line votes on each issue where Thune voted against most Republicans. The tick is the median for Senate Republicans.

  1. Armed Forces and National Security 10% · 1 of 10 party 0%
  2. Government Operations and Politics 8% · 1 of 13 party 0%
  3. Economics and Public Finance 8% · 14 of 184 party 1%
Every issuePro

See all 6 issues where Thune has broken with Republicans, and filter the voting record to those votes.

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Notable votes

Full record (Pro)

Where Thune broke with their party, close outcomes and final passage votes on named bills, newest first.

DateMeasureTitleVote Party split (yea)Result
07/14/26 S. 4784 National Defense Authorization Act for Fiscal Year 2027On Cloture on the Motion to Proceed · This bill sets forth policies and authorities for FY2027 for Department of Defense (DOD) programs, activities, and military construction as…Broke w/ party Nay Failed
50–46
03/26/26 H.R. 7147 Homeland Security and Further Additional Continuing Appropriations Act, 2026.On Cloture on the Motion to Proceed · This bill provides FY2026 appropriations for various agencies and offices within the Department of Homeland Security (DHS), except for U.S.Broke w/ party Nay Failed
53–47
03/12/26 H.R. 7147 Homeland Security and Further Additional Continuing Appropriations Act, 2026.On the Cloture Motion · This bill provides FY2026 appropriations for various agencies and offices within the Department of Homeland Security (DHS), except for U.S.Broke w/ party Nay Failed
51–46
02/24/26 H.R. 7147 Homeland Security and Further Additional Continuing Appropriations Act, 2026.On Cloture on the Motion to Proceed · This bill provides FY2026 appropriations for various agencies and offices within the Department of Homeland Security (DHS), except for U.S.Broke w/ party Nay Failed
50–45
02/12/26 H.R. 7147 Homeland Security and Further Additional Continuing Appropriations Act, 2026.On the Cloture Motion · This bill provides FY2026 appropriations for various agencies and offices within the Department of Homeland Security (DHS), except for U.S.Broke w/ party Nay Failed
52–47
01/30/26 H.R. 7148 Consolidated Appropriations Act, 2026On the Motion to Table · This bill provides appropriations to several federal departments and agencies for the remainder of FY2026 and provides continuing FY2026…Broke w/ party Yea Passed
67–33
01/30/26 H.R. 7148 Consolidated Appropriations Act, 2026On the Amendment · This bill provides appropriations to several federal departments and agencies for the remainder of FY2026 and provides continuing FY2026…Broke w/ party Nay Failed
32–67
01/29/26 H.R. 7148 Consolidated Appropriations Act, 2026On Cloture on the Motion to Proceed · This bill provides appropriations to several federal departments and agencies for the remainder of FY2026 and provides continuing FY2026…Broke w/ party Nay Failed
45–55

Yea ■ filled · Nay □ open · Not voting – dash. Party split bars: Democrats left, Republicans right; dark = yea, light = nay.

What Thune is saying

All 25 statements and posts

◇ statements (press releases) · ○ posts. When a statement names a bill Thune voted on, the vote is shown next to it.

Effectiveness, 119th Congress so far

How it’s measured
1.11· expected 1.02

Meets expectations

Rank 31 of 100 in the Senate ┃ expected = average of 32 majority-party members without a committee lead

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

  1. Introduced 21
  2. Action in committee 5
  3. Action beyond committee 5
  4. Passed chamber 1
  5. Became law 1

21 bills and joint resolutions sponsored: 1 significant (got a roll call vote), 20 substantive, 0 commemorative. Compare the Senate

Became law (1)

1 national policy

Scope tags come from an AI reading of each bill where available, otherwise from its title and policy area. They don’t change the score. How scope is tagged

How Thune’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 Thune.

100/ 100

Chamber median 98 ┃ 1 missed of 915

Voted on 914 of 915 roll calls; missed 1. Higher than 96% of senators.

85% 100%

Party loyalty

How it’s measured
98/ 100

Senate R median 100 ┃ Rank 46 of 53

Sided with the Republican majority on 839 votes that split the parties. Lower than 64% of senators.

75% 100%
11/ 100

Chamber median 9 ┃ +2

Average agreement with members of the other party on contested votes. Higher than 75% of senators.

0% 30%
+0.43

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.

Liberal Conservative

Bills, 119th Congress

All 58 sponsored bills

Sponsored 58 (Senate median 61) · cosponsored 69 (median 307.5), 3 of them as an original cosponsor · most often on Congress, Agriculture and Food, Taxation.

Votes by issue

How votes are tagged
IssueVotesYea shareWith party
Nominations224 100% Pro
Economics and Public Finance207 32% Pro
Other118 100% Pro
Immigration37 27% Pro
International Affairs36 17% Pro
Defense & national security34 94% Pro
Energy & environment26 100% Pro
Congress19 89% Pro
Environmental Protection19 63% Pro
Finance and Financial Sector19 74% Pro
Armed Forces and National Security18 56% Pro
Public Lands and Natural Resources15 100% Pro
Energy13 100% Pro
Government Operations and Politics13 69% Pro
Taxes, finance & economy13 100% Pro
Sports and Recreation12 67% Pro
Transportation and Public Works12 42% Pro
Foreign affairs & trade10 100% Pro
Health care10 100% Pro
Housing and Community Development9 100% Pro
Transportation & infrastructure8 100% Pro
Taxation7 57% Pro
Budget & appropriations7 100% Pro
Foreign Trade and International Finance6 17% Pro
Crime and Law Enforcement4 100% Pro
Health4 25% Pro
Education & families3 100% Pro
Education2 50% Pro
Emergency Management2 0% Pro
Science, Technology, Communications2 100% Pro
Immigration & border2 100% Pro
Crime & justice2 100% Pro
Families1 0% Pro

Who votes alike

Method

Agreement on contested votes where both cast yea or nay.

Most aligned

  1. RAlan ArmstrongOK Senate98%agreement
  2. RPete RickettsNE Senate98%agreement
  3. RDeb FischerNE Senate98%agreement
Full voting networkPro

See all twelve closest allies, the members Thune most often votes against, and the closest allies in the other party.

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Campaign money

Method

In the 2025–26 cycle Thune’s campaign raised $4.1M: $1.3M (32%) from individuals and $758K (18%) from PACs and other committees. Cash on hand: $17.7M.

Through Jun 30, 2026; filings lag, so recent gifts can take weeks to appear. Money raised also counts loans and transfers, so the shares need not add to 100%. Source: FEC.gov.

Last cycle, party money, self-funding and debts are part of Pro. See Pro

Who funds Thune

The largest PACs and other committees giving directly to the campaign this cycle, of 178.

  1. Mortgage Bankers Association Trade association PAC
Amounts, the top 10 and who else they fundPro

See how much each organization gave Thune this cycle and last, the mix of corporate, labor, trade and other PACs, and who else each one funds.

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Thune’s own leadership PAC: Commonsense, Conservative Values PAC, Heartland Values PAC. A separate PAC a member sponsors to give to other candidates.

Record over time

Historical recordPro

Compare Thune’s measures across every Congress on file.

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Résumé and contact