Democrat Willis and Republican Airdo previously faced off in the same race two years ago. Willis defeated Airdo then with 70 percent of the vote.
The Sun-Times endorsed Democrat incumbent Willis for a fourth term in the 77th District Illinois House seat, citing her efforts to curb gun violence, which include driving passage of the Firearms Restraining Order Act, the law that allows guns to be seized from people who are dangers to themselves or others.
The 77th District straddles the border between DuPage and Cook County and encompasses Bensenville, Northlake, Addison, and O’Hare airport.
For live election results, visit the Sun-Times election guide.