CalledUnofficial results
South Dakota Legislative District 12
South Dakota State Senate · South Dakota
Kari Shanard-Koenders held the seat for Republicans, winning by 1.7 points over Joe Zweifel.
Kari Shanard-KoendersRepublican · winner
50.8%4,011
Joe ZweifelDemocrat
49.2%3,877
7,888 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.
Joe ZweifelKari Shanard-Koenders
$3.5K
Raised by the campaign
$1.2K
$969
Spent by the campaign
$155
$2.6K
Cash on hand
$1K
Campaign money: South Dakota Secretary of State, through Oct 20, 2026; South Dakota Secretary of State, through May 15, 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.
- Joe Zweifel
- 66%
- Kari Shanard-Koenders
- 34%
- Projected margin
- D+2.9