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  1. Senate

South Dakota Senate winner?

Resolves by winning party
2
Combo
Chance
Mike Rounds
Republican party
94.6%
▲ 0.2

Mike Rounds

Republican party
94.6%
▲ 0.2
Brian Bengs
Independent
6%
▲ 1

Brian Bengs

Independent
6%
▲ 1
Julian Beaudion
Democratic party
0.4%
▼ 0.1

Julian Beaudion

Democratic party
0.4%
▼ 0.1
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South Dakota Senate margin of victory
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South Dakota Senate election: Brian Bengs vote percent
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South Dakota Senate election: Mike Rounds vote percent
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Combo
South Dakota Senate winner?

Mike Rounds

Odds
95% chance
Max payout
Nov 3, 2027
$0
Bengs
Nov 3 ·R +11.6margin forecast
Rounds
$641,143 vol
Race Intel

South Dakota Senate Race 2026

ElectionNov 3, 2026General election
IncumbentMike Rounds (R)Running for re-election

South Dakota Senate Candidates and Fundraising

CandidatePollsRaisedSmall Donors
  • Mike RoundsR51.4%
    51.4%
    $3.2M
    1.2%
    $3.2M raised·1.2% small donors
  • Brian BengsI—
    —
    $782.1K
    61%
    $782.1K raised·61% small donors
Polling averages · Fundraising: FEC filings · Small-donor ≤ $200. This does not include third party expenditures.

Past South Dakota Election Results

Past presidential elections

2024R +29.2%2020R +26.2%