South Dakota Senate 2026 General Election
The South Dakota Senate general election is on November 3, 2026. The model makes Republican Mike Rounds the heavy favorite at 98%, with Democrat Julian Beaudion at 2%. Mike Rounds is the incumbent, leads the field in reported fundraising, and has the most tracked endorsements. Public polling is available for this race and feeds the forecast alongside fundraising, endorsements, and historical results.
Current win probabilities
- Mike Rounds (incumbent) — 98%
- Julian Beaudion — 2%
Probabilities update daily from polls, fundraising, endorsements, and historical results. Last updated July 23, 2026.