South Dakota Senate Race Odds 2026
Prices as of 2026-09-19 18:30 UTC.
Kalshi has Mike Rounds at 92%; Polymarket has Mike Rounds (R) at 94%.
| Candidate / party | Kalshi | Polymarket | Gap |
|---|---|---|---|
| Julian Beaudion D | 1% bid 0¢ · ask 1¢ · OI $19k | <1% vol $13k | +1 pts |
| Mike Rounds R | 92% bid 91¢ · ask 93¢ · OI $34k | 94% vol $18k | -1 pts |
| Brian Bengs (I) | — | 7% vol $1k | — |
South Dakota Senate 2026 — Kalshi · Mike Rounds · Polymarket · Mike Rounds (R) · last 90 days
How the Kalshi market resolves
If a representative of the Republican party is sworn in as a Senator of South Dakota for the term beginning in 2027, then the market resolves to Yes.