Sonja Mentzer
Won the 2026 race for South Dakota Legislative District 11.
- Last margin
- +0.3
- Won 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative records
Every race Mentzer has run
Baseline: how the seat voted for president in the same or nearest year. Running ahead of it means Mentzer 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 | South Dakota Legislative District 11 | General | Won | Brian Mulder (R), Keri K. Weems (R) | 30.2% | D+0.3 | $11K | R+9.6 | |
| 2024 | South Dakota House of Representatives, District 11 | General | Lost | Brian Mulder (R), Keri Weems (R), Aaron Matson (D) | 21.9% | R+7.8 | — | — |
Source: 99chambers results archive; 2026: South Dakota Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Money
Mentzer’s campaign fundraising.
- Raised, 2025–26
- $11K
Source: South Dakota Secretary of State filings through Oct 20, 2026Updated Nov 1, 2026, 2:15 AM ET
What’s next
From campaign filings, not from public statements.
| Sonja Mentzer for South Dakota State | Active |
Source: South Dakota Secretary of State filings through Oct 20, 2026Updated Nov 1, 2026, 2:15 AM ET
Who Mentzer has run against
- Brian Mulder (R) · 2026 general, won
- Brian Mulder (R) · 2024 election, lost
Source: 99chambers results archive; 2026: South Dakota Secretary of State (unofficial)
The seat
- South Dakota Legislative District 11 · lean R+9.5 · 9th most Democratic of 34
Source: 99chambers: presidential results on current lines (MEDSL precinct returns)