1990Flipped from RepublicanFinal resultsIncumbent defeated
1990 election for South Dakota Legislative District 10
South Dakota State Senate · South Dakota
Gerald F. Lange (D) won with 52.5% of the vote, defeating Wallace B. Hanson (R) by 5.0 points, a seat Republicans won last time.
Gerald F. LangeDemocrat · winner
52.5%3,966
Wallace B. HansonRepublican · incumbent
47.5%3,585
7,551 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