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Races › South Dakota › U.S. Senate
Tuesday, November 3, 2026 · general election
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South Dakota, statewide4 filed with the FEC$5.9M raised by the field
Mike Rounds · Brian Bengs
and 5 more, in the campaign’s own order. Read them in their words
FEC filings through Oct 14, 2026
On the general election ballot
Nov 3, 2026 · South Dakota US Senate
Mike Rounds holds this Senate seat; the current term began January 2021.
Filing with the FEC is a disclosure, not a place on the ballot. Money raised is not a forecast.
November nominees first, then by money raised. Bars are in party color; raised includes loans from the candidate, and spent can exceed raised when a campaign spends money left from earlier cycles.
Senate: bars drawn to $3.8M, the most raised; FEC reports through Oct 14, 2026.
and 4 more, in the campaign’s own order. Read them in their words
FEC filings through Oct 14, 2026
On the general election ballot
Nov 3, 2026 · South Dakota US Senate
No published priorities
FEC filings through Sep 30, 2026
No published priorities
FEC filings through Sep 30, 2026
Lost the Republican primary
Jun 2, 2026 · 32,412 votes (24.2%) · 2 of 2
These filed with the FEC for this seat but are not on the FEC’s list for this race. They are not counted in the figures above.
No published priorities
From this site’s FEC import
Held by John Thune R (not running in the 2026 cycle) and Mike Rounds R (on the general election ballot)
Every public poll of the South Dakota Senate race this cycle, as published. A poll is a snapshot, not a forecast.
Election November 3, 2026 · 3 polls of this matchup
Mike Rounds leads Brian Bengs by 20.6 points · average gap, 2 latest nonpartisan polls · 1 far-off poll left out
Each dot is a poll. The line is the median of the 5 latest nonpartisan polls. How polls are read
Not counted in the lead. This poll has Rounds +8, 11 points from the median of the race's latest nonpartisan polls (Rounds +19); a poll more than 8 points from it is left out.
Primary June 2, 2026 · 1 poll
Mike Rounds won. The race has been called, but the results source does not say how much of the vote it counted, so the polls are not measured against the margin.
| Poll | Mike Rounds | Justin McNeal | Lead |
|---|---|---|---|
| Result, partial count | 75.8% | 24.2% | — |
June 2, 2026 · Result
Poll data from The New York Times, licensed CC BY 4.0 · Updated October 28, 2026 · 11 polls paid for by a party or campaign are left out
$2.9M from outside groups for or against these candidates, through Oct 24, 2026.
Independent expenditures, with 24- and 48-hour notices filed since each group’s last regular report.