2012Final results
2012 election for Illinois Legislative District 46
Illinois State Senate · Illinois
Dave Koehler (D) won with 54.2% of the vote, defeating Pat Sullivan (R) by 8.4 points.
Dave KoehlerDemocrat · winner · incumbent
54.2%45,054
Pat SullivanRepublican
45.8%38,104
83,158 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