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Back to US Midterm Tracker 2026

South Dakota

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Senate

U.S. Senate

Win probability
  • RMarion Michael "Mike" Rounds95.9%
  • IBrian L. Bengs4.1%
Details & rationale →

South Dakota · Race details

U.S. Senate

Forecast as of Oct 2, 2026 UTC

Win probabilities

  • RMarion Michael "Mike" RoundsRepublican95.9%
  • IBrian L. BengsIndependent4.1%

Race rationale

Loading rationale…

Candidate sources & notes

Source-listed candidates retrieved 28 September 2026; not an official certification or completeness claim. Additional affiliations not shown as ballot party labels: Brian L. Bengs — Democratic.

Candidate source 1 (opens in a new tab)Candidate source 2 (opens in a new tab)