CalledUnofficial resultsIncumbent defeated
South Dakota Legislative District 11
South Dakota House of Representatives · South Dakota
Sonja Mentzer and Brian Mulder won the district's 2 seats.
Two representatives per district
Sonja MentzerDemocrat · winner
30.2%4,234
Brian MulderRepublican · winner · incumbent
29.8%4,191
Keri K. WeemsRepublican · incumbent
28.9%4,062
Tracey QuintLibertarian
11.1%1,554
14,041 votes
Source: South Dakota Secretary of State unofficial resultsUpdated Nov 7, 2026, 1:22 PM ET
Where the race moved
Against the 2024 presidential vote
The seat's recent races
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)
Money in this race
Each line compares the two campaigns on one scale.
Sonja MentzerBrian Mulder
$11K
Raised by the campaign
$41.6K
$6.4K
Spent by the campaign
$36K
$8.7K
Cash on hand
$15K
Other candidates' campaigns: Keri K. Weems $31.7K.
Campaign money: South Dakota Secretary of State, through Oct 20, 2026.
Source: South Dakota Secretary of State campaign filingsUpdated Oct 20, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
- Sonja Mentzer
- 25%
- Brian Mulder
- 75%
- Projected margin
- R+4.8