2018Final results
2018 election for Illinois Legislative District 45
Illinois State Senate · Illinois
Brian W. Stewart (R) won with 62.6% of the vote, defeating David Simpson (D) by 25.3 points.
Brian W. StewartRepublican · winner
62.6%49,936
David SimpsonDemocrat
37.4%29,781
79,717 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET