1990Final results
1990 election for South Dakota Legislative District 15
South Dakota State Senate · South Dakota
Karen Muenster (D) won with 60.5% of the vote, defeating Mary Nustad (R) by 21.0 points.
Karen MuensterDemocrat · winner · incumbent
60.5%3,190
Mary NustadRepublican
39.5%2,083
5,273 votes
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET
The seat over time
D − R margin in this seat's races around 1990
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET