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.

From Wikipedia.

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

Georgia

Iowa

Kentucky

  • Andy Barr (Republican) · Kentucky U.S. Senate

Maine

Michigan

Mississippi

North Carolina

Oklahoma

South Carolina

Texas

Endorsements as listed in the Endorsements sections of Wikipedia's 2026 race articles, each with its own citation there. Those lists cover federal and statewide races well and local races little, so an endorser may have endorsed others not shown here. All endorsers.

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