Elections · U.S. Senate · South Dakota
South Dakota Senate race
Mike Rounds holds this seat and is running to keep it against Brian Bengs.
The November ballot
Raised so far, filed with the FEC
General-election ballot as recorded August 27, 2026. Not a prediction.
The seat
Mike Rounds
Republican · Holds the seat now
From the member's own disclosures and congress.gov. Not cosponsoring is not a vote against a ban.
How to vote in South Dakota
- General electionNovember 3, 2026In 10 weeks
Register 15 days before the election.
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How they won the primary
The primary · 133,625 votes
- Mike RoundsWon75.8%101,284
- Justin McNeal24.2%32,341
Primary results as recorded August 27, 2026, in the canvass's own published order. Via Wikipedia (CC BY-SA), which cites each state's canvass. A primary result is a filed fact about a past contest, not a prediction of November.
The money on this race
- Raised by candidates
- $5.5M
- Outside money
- $566K
Outside money, for and against
Independent expenditures; direction is each filer's own declared filing.
Where each candidate's money comes from
Small donors give under $200; PACs are political action committees. Shares of each candidate's own receipts on file with the FEC. Outside money is not part of these figures.
Who is spending on this race
The 2 groups spending independently here, ranked; open a row for whose race the money went into.
Independent expenditures reported to the FEC; direction is each group's own declared filing.
Not on the November ballot
2 filedPrimary candidates who did not advance, committees still on file, and candidacies that ended. Being here is a filing fact, not a mark against anyone.
How this seat voted last time
R+31 in 2020
- Mike RoundsWon65.7%
- Dan Ahlers34.3%
420,219 votes for candidates. A past result is a filed fact, not a prediction of November.
Certified returns via MIT Election Data and Science Lab, from the House Clerk's election statistics and state canvasses.
Candidates and financing from the FEC, public domain; money figures carry their own coverage dates. Dataset built 2026-08-27. Nothing here is a forecast, a grade, or a ranking of candidates.