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South Dakota, statewide4 filed with the FEC$5.9M raised by the field
Mike Rounds · Brian Bengs
- $3.8M raised$1.3M cash on handTheir first priorities
- Put America FIRST
- National Security
- Education
In their words
- Put America FIRST
- National Security
- Education
and 5 more, in the campaign’s own order. Read them in their words
Money
FEC filings through Oct 14, 2026
On the ballot
Won the general election
Nov 3, 2026 · 184,589 votes (60.5%)
In office
Mike Rounds holds this Senate seat; the current term began January 2021.
Open full recordFEC S4SD00049 - $1.9M raised$69.7K cash on handTheir first priorities
- My Vision
- The Politics Industry Problems
- Competition Is the Cure
In their words
- My Vision
- The Politics Industry Problems
- Competition Is the Cure
and 22 more, in the campaign’s own order. Read them in their words
Money
FEC filings through Oct 14, 2026
On the ballot
Lost the general election
Nov 3, 2026 · 120,513 votes (39.5%) · 2 of 2
Open full recordFEC S6SD01117
- $247.6K raised$696 cash on hand
In their words
No published priorities
We have not found a campaign site for Julian C. Beaudion yet.Money
FEC filings through Sep 30, 2026
Open full recordFEC S6SD01125 - $11K raised$1 cash on hand
In their words
No published priorities
We have not found a campaign site for Justin McNeal yet.Money
FEC filings through Sep 30, 2026
On the ballot
Lost the Republican primary
Jun 2, 2026 · 32,412 votes (24.2%) · 2 of 2
Open full recordFEC S6SD01133
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.
- $0 raised$0 cash on hand
In their words
No published priorities
We have not found a campaign site for William Tremeyne Beauford III yet.Money
From this site’s FEC import
Open full recordFEC S6SD01109
Held by John Thune R (not running in the 2026 cycle) and Mike Rounds R (won the general election)
Polls
Every public poll of the South Dakota Senate race this cycle, as published. A poll is a snapshot, not a forecast.
November general election
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
- RMike Rounds56.4% median
- IBrian Bengs37.4% median
Each dot is a poll. The line is the median of the 5 latest nonpartisan polls. How polls are read
Election result and the final polls
Mike Rounds won. The race has been called, but the count we have stopped at 79.51% reporting, so the polls are not measured against the margin.
| Poll | Mike Rounds | Brian Bengs | Lead |
|---|---|---|---|