Illinois State Board of Elections

Illinois Senate President Don Harmon's campaign accepted a $50,000 contribution from ARB Interactive, the parent company of Modo, an online casino group facing allegations of illegal gambling operations in Illinois and Arizona. The campaign later stated it would donate the same amount to local charities. The contribution occurred days before a legislative session on gambling regulation.

The U.S. Supreme Court rejected a Republican National Committee challenge to Illinois' mail-in ballot rules, allowing ballots postmarked by Election Day to be counted even if received afterward. President Donald Trump criticized the decision as a loss and reiterated support for the SAVE America Act, which would ban most mail ballots and require proof of citizenship for voter registration. Illinois permits mail ballots to arrive up to two weeks after Election Day if postmarked on time, with Justice Amy Coney Barrett writing the majority opinion.

Independent candidates Mayra Macias and Byron Sigcho-Lopez are fighting to retain their November ballot status in the 4th Congressional District race after thousands of their petition signatures were challenged. Both candidates fell short of required signature thresholds and must verify disputed signatures by Wednesday. Critics argue the state’s objection process disproportionately disadvantages independent candidates compared to party-backed nominees.