Brian Bengs
Lost the 2026 race for U.S. Senate in South Dakota.
- Last margin
- −21.0
- Lost 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative records
Background
As listed by the official candidate list, Wikidata and campaign filings. 99chambers does not summarize platforms or endorsements.
- On the ballot as
- U.S. Navy and Air Force veteran, former Northern State University political science professor, and Democratic nominee for U.S. Senate in 2022
Every race Bengs has run
Baseline: how the seat voted for president in the same or nearest year. Running ahead of it means Bengs won voters the party’s presidential nominee did not; primaries have no baseline.
| Year | Office | Stage | Result | Opponents | Share | Margin | Raised | Baseline | Against baseline |
|---|---|---|---|---|---|---|---|---|---|
| 2026 | U.S. Senate in South Dakota | General | Lost | Mike Rounds (R) | 39.5% | −21.0 | $1.9M | −29.9 | |
| 2022 | U.S. Senate, South Dakota | General | Lost | John Thune (R), Tamara J. Lesnar (L) | 26.1% | −43.5 | — | — |
Source: 99chambers results archive; 2026: South Dakota Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Money
Bengs’s campaign fundraising, and outside money in Bengs’s races this cycle.
- Raised, 2025–26
- $1.9M
- Outside, for Bengs
- $879.8K
- Outside, against Bengs
- $985.3K
Source: FEC filings through Oct 14, 2026Updated Nov 3, 2026, 2:14 AM ET
What’s next
From campaign filings, not from public statements.
| BENGS FOR SOUTH DAKOTA FEC | Active |
Source: FEC filings through Oct 14, 2026Updated Nov 3, 2026, 2:14 AM ET
Polls of Bengs’s races
The 2026 general average had Bengs behind by 10.0; Bengs lost by 21.0.
| Race | Average | Result |
|---|---|---|
| 2026 · 15 polls | −10.0 | −21.0 |
Source: 99chambers polling average on Election Day; 2026 results: South Dakota Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Who Bengs has run against
- Mike Rounds (R) · 2026 general, lost
- John Thune (R) · 2022 election, lost
Source: 99chambers results archive; 2026: South Dakota Secretary of State (unofficial)
How we know Bengs
One person, matched across every source we use.
- FEC S6SD01117
Source: Identity links: Wikidata, congress-legislators, Open States, FEC