Elections Intelligence

South Dakota U.S. Senate

DEFENDED SEAT
SAFE R
Mike Rounds Republican · Incumbent
KALSHI PERSON MARKETCHECKED Aug 27
1.7¢REPUBLICAN 96.4¢
View market on Kalshi ↗
Brian Bengs Independent · Challenger
FTP RACE SIGNAL

No market prices this seat. The most recent general-election poll puts the Republican ahead by 23 points — a 31-point Republican hold in 2020.

Safe R
SAFE DLIKELY DLEAN DTOSS-UPLEAN RLIKELY RSAFE R
Polling · Safe RR+23 — NRSC, Aug 6. Prior result · Safe RR+31.48 in 2020.
Signal clarityHighas of 2026-08-06
MARKET BandPRICEToss-up50–65¢Lean65–82¢Likely82–95¢Safe95¢ and above

No settling contract prices this race, so there is no market reading.

POLLING BandPOINTSToss-up0–5Lean5–10Likely10–20Safe20 and above
R+23
NRSC ↗ Jul 6 - 9 · n=500 LV R+23 R SPONSOR
Public Opinion Strategies (R) ↗ July 6–9, 2026 · n=500 LV R+23 R SPONSOR
PPP ↗ B May 29 - 30 · n=726 RV R+4 D SPONSOR
PRIOR RESULT BandPOINTSToss-up0–5Lean5–12Likely12–25Safe25 and above
R+31.48

Rounds, Mike (R)

65.74 — 34.26 · 2020 general election

def. Ahlers, Dan (D). Margin verified against retrieved official results.

FUNDRAISING BandRATIO TO 1Parity1–5Lean5 and above
4.1 to 1
Mike Rounds$3.18M
Brian Bengs$782.0K

PULLED 08-04 · PERIOD 06-30 · FEC

Total receipts this cycle.

BALLOT & DATES Primary 06-02 · HELDRunoff 07-28 · HELDGeneral Nov 3, 2026 R settled · D no candidate · I settled COMPARE THE CANDIDATES ⇄