Brian Bengs
Independent candidate for South Dakota U.S. Senate · general election Tuesday, Nov. 3, 2026
Independent Challenger INC '26 slate
Brian Bengs is running for South Dakota U.S. Senate in the Nov. 3, 2026 general election and filed with the FEC as an independent. As of , Kalshi prices Brian Bengs’s chance of winning at 4.5%. Polymarket prices it at 4.5%. The campaign has reported raising $1.9M and had $70K in cash on hand through Oct. 14, 2026.
Named to the 2026 Independent Slate presented at the Independent National Convention (Sept. 23–25, 2026). Source: The Fulcrum, Oct. 14, 2026. Listed as a matter of record, not as an endorsement.
Prediction markets
24h change: ▲ 0.5 pts · bid 4.0¢ · ask 5.0¢ · last trade 4.0¢
“Will Brian Bengss win the Senate race in South Dakota?”
Source: Kalshi market SENATESD, contract SENATESD-26-BBEN. Total volume 281,515 contracts. Read .
24h change: ▲ 0.1 pts · bid 3.9¢ · ask 5.1¢ · last trade 5.1¢
“Will Brian Bengs win the South Dakota Senate race in 2026?”
Thin market: under $25,000 traded in total, so small trades can move this price a lot.
Source: Polymarket market south-dakota-senate-election-winner, contract 630939. Total volume $16K. Read .
Odds over time
Daily closing prices from each platform's price-history endpoint, then this tracker's hourly reads for the last 14 days. Stored in data/history.csv.
The whole race, as the markets price it
South Dakota Senate winner?
| Outcome | Implied chance |
|---|---|
| Mike Rounds | 95.2% |
| Brian Bengs | 4.5% |
| Julian Beaudion | 0.5% |
Source: Kalshi SENATESD; read .
South Dakota Senate Election Winner
| Outcome | Implied chance |
|---|---|
| Mike Rounds (R) | 95.1% |
| Brian Bengs (I) | 4.5% |
| Democrat | 0.1% |
Source: Polymarket south-dakota-senate-election-winner; read .
Campaign money
Source: FEC candidate summary S6SD01117 (bulk file weball26), reports through Oct. 14, 2026; file published . Figures cover the 2025–26 two-year period and include only what the campaign itself reported.
Money in this race
Candidates the race's prediction markets list, with what each campaign reported to the FEC.
| Party | |||
|---|---|---|---|
| Mike Rounds | R | $3.8M | $1.3M |
| Brian Bengs | I | $1.9M | $70K |
| Julian Beaudion | D | $248K | $696 |
Source: FEC candidate summaries (bulk file weball26). Party labels from the FEC, or from the market where the FEC record has none.
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How these numbers are made: methodology. Something wrong? Report a correction.