Primary
Republican Primary
Held June 2, 2026.
| Candidate | Votes | % | |
|---|---|---|---|
| Mike Rounds ✓ | 101,471 | 75.8% | |
| Justin McNeal | 32,412 | 24.2% |
Full calendar and every race: South Dakota primary guide
Race Overview
Candidates
Mike Rounds Nominee Incumbent
RepublicanJulian C Beaudion Won Primary — Withdrew
DemocratJulian C Beaudion dropped out; the Democrat nomination is outstanding until the party names a replacement.
Average reflects all polls from the last 30 days; table shows the most recent 30 days or the newest 3 polls, whichever is more. How accurate is each pollster? →
No polls in the last 90 days.
Questions About This Race
Is the 2026 South Dakota Senate race competitive?
No — the expert consensus rates it Safe R for Republicans.
Why is there no Democrat nominee in the 2026 South Dakota Senate race?
Julian C Beaudion dropped out; the Democrat nomination is outstanding until the party names a replacement.
When is the 2026 South Dakota Senate race decided?
Election Day is Tuesday, November 3, 2026.
How is the PollingSource average calculated?
The PollingSource average is the unweighted mean of every scientific public poll of the race from the last 30 days — we do not exclude pollsters. Each race page lists the individual polls behind the average with pollster, field dates, sample size, and margin of error. Full details: pollingsource.com/methodology.
Race Notes
Two-term incumbent
Independent Expenditures Updated just now
Top Spenders
- DEFEND AMERICAN JOBS GOP-aligned $423,164
- SOUTH DAKOTA CONSERVATIVE PAC GOP-aligned $154,100
Full outside-spending research — every committee, every race →