2010Flipped from DemocraticFinal resultsIncumbent defeated
2010 election for Wisconsin Senate District 5
Wisconsin State Senate · Wisconsin
Leah Vukmir (R) won with 52.2% of the vote, defeating Jim Sullivan (D) by 4.5 points, a seat Democrats won last time.
Leah VukmirRepublican · winner
52.2%36,852
Jim SullivanDemocrat · incumbent
47.7%33,702
70,663 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