Gov. Bruce Rauner denies that the ad, portraying his challenger marrying the Illinois House speaker, is antigay.
Kevin Morrison, a Democratic candidate for Cook County Board, says the ad depicts him as limp-wristed; Republicans counter that it shows him as a puppet.
The decision from a federal appeals court comes in the case of a lesbian who says she was physically and verbally assaulted other tenants at her senior housing facility.
The law currently applies to employers with 15 or more workers, but the vetoed bill would have extended its coverage to all employers.
Illinois state legislator Nick Sauer resigned after the revelations.
Gov. Bruce Rauner is facing backlash after making a same-sex couple husband and husband.
Twelve-year-old Molly Pinta is raising funds to bring Pride to her hometown of Buffalo Grove.