Federal candidate · 2025–2026 cycle
William Tremeyne Beauford III
- Party
- Republican
- Running for
- U.S. Senate · South Dakota
- Filing address
- Sioux Falls, SD (city and state on the FEC filing)
- FEC filing name
- BEAUFORD, WILLIAM TREMEYNE MR III
- Next election
- General November 3, 2026 (Wikipedia, checked October 22, 2026; confirm with your state election office)
South Dakota
FEC candidate ID S6SD01109 · No principal campaign committee on file
No financial reports filed yet. This candidate has registered with the FEC but has not filed a report with money totals for the 2025–2026 cycle.
The FEC’s page for this candidate is the official source.
The race
South Dakota U.S. Senate, 2026 · 5 registered candidates
| Candidate | Raised | Cash on hand | Through |
|---|---|---|---|
| Mike Rounds (R) | $3,810,748.34 | $1,295,542.92 | 2026-10-14 |
| Brian Bengs (I) | $1,678,331.53 | $145,703.12 | 2026-09-30 |
| Julian C Beaudion (D) | $247,595.86 | $695.75 | 2026-09-30 |
| Justin S McNeal (R) | $10,993.13 | $1.34 | 2026-09-30 |
Polling and ratings
Race ratings
Recent polls
| Pollster | Dates | Sample | Margin of error | Results |
|---|---|---|---|---|
| Quantus Insights (R) | October 17–19, 2026 | 633 (LV) | ± 4.1% | Mike Rounds 57% · Brian Bengs 37% |
| Public Opinon Strategies (R) | October 12–16, 2026 | 500 (LV) | ±4.4% | Mike Rounds 54% · Brian Bengs 37% |
| Concord Public Opinion Partners (D) | October 6–8, 2026 | 400 (LV) | ±4.9% | Mike Rounds 42% · Brian Bengs 43% |
| Zenith Research | September 24–27, 2026 | 500 (LV) | ±4.4% | Mike Rounds 53% · Brian Bengs 47% |
| Public Policy Polling (D) | September 8–9, 2026 | 629 (RV) | ±3.6% | Mike Rounds 45% · Brian Bengs 42% |
| Lake Research Partners (D) | August 26–30, 2026 | 500 (LV) | ±4.4% | Mike Rounds 44% · Brian Bengs 51% |
Ratings and polls as listed on Wikipedia: 2026 United States Senate election in South Dakota (retrieved October 22, 2026), licensed CC BY-SA 4.0. TerraCivic does not rate races or compute its own average.
Sources and updates
- Money: FEC bulk data (candidate summary, committee master, committee-to-candidate contributions), retrieved October 23, 2026. FEC candidate page.
- Polling, ratings and candidate status: Wikipedia, retrieved October 22, 2026 (CC BY-SA 4.0).
- Status shown above comes from the FEC candidate file.
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