2012Final results
2012 election for Wisconsin Senate District 20
Wisconsin State Senate · Wisconsin
Glenn Grothman (R) won with 68.6% of the vote, defeating Tanya Lohr (D) by 37.3 points.
Glenn GrothmanRepublican · winner · incumbent
68.6%66,882
Tanya LohrDemocrat
31.3%30,504
97,460 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 2012
Races before and after
Source: Harvard Dataverse / Carl KlarnerUpdated Sep 30, 2026, 7:29 AM ET