2010Flipped from DemocraticFinal resultsIncumbent defeated
2010 election for Wisconsin Senate District 21
Wisconsin State Senate · Wisconsin
Van Wanggaard (R) won with 52.5% of the vote, defeating John W. Lehman (D) by 5.1 points, a seat Democrats won last time.
Van WanggaardRepublican · winner
52.5%32,036
John W. LehmanDemocrat · incumbent
47.4%28,930
60,995 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 2010
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET