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Tip the Scale Blue — election intelligence for 2026 progressives. Poll data from Ballotpedia. Ratings from Cook, Sabato, and Inside Elections.

South Dakota · Senate

TBDvsJohn Thune

Score updated Mar 4, 2026

386MONITOR

Priority Score Breakdown

Candidates

John Thune

Republican· Incumbent

Progressive votes: 2.24%

Mike Rounds

Republican· Incumbent

Progressive votes: 1.19%

War Chest (FEC)

Dem

—

Thune

$17.0M

Cash on hand, most recent FEC filing.

Expert Ratings

Cook PoliticalCookSafe R

Sabato's Crystal BallSabatoSafe R

Inside ElectionsIESafe R

South Dakota senate — Score 386 | Tip the Scale Blue