John Thune
Senate majority leader (2025–present) from South Dakota (2005–present). Endorsed 11 candidates in 2026.
Who they are
John Randolph Thune is an American politician serving as the senior United States senator from South Dakota, a seat he has held since 2005. A member of the Republican Party, Thune has served since 2025 as Senate majority leader and Senate Republican leader.
Where their endorsements fall
Of the 11 endorsed candidates on our ballots: 11 Republicans.
The 10 with a published academic score (Voteview, Shor–McCarty or DIME) average moderately right. This describes the candidates they endorsed, not John Thune themselves.
Who they endorsed
Alabama
- Barry Moore (Republican) · Alabama U.S. Senate
Georgia
- Mike Collins (Republican) · Georgia U.S. Senate
Iowa
- Ashley Hinson (Republican) · Iowa U.S. Senate
Kentucky
- Andy Barr (Republican) · Kentucky U.S. Senate
Maine
- Susan Collins (Republican) · Maine U.S. Senate
Michigan
- Mike Rogers (Republican) · Michigan U.S. Senate
Mississippi
- Cindy Hyde-Smith (Republican) · Mississippi U.S. Senate
North Carolina
- Michael Whatley (Republican) · North Carolina U.S. Senate
Oklahoma
- Kevin Hern (Republican) · Oklahoma U.S. Senate
South Carolina
- Darline Graham (Republican) · South Carolina U.S. Senate
Texas
- Ken Paxton (Republican) · Texas U.S. Senate
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