Way back in 1981, Governor Jim Thompson got into a fight with the Illinois General Assembly over who should fund the salaries of county state's attorneys.
By law, Illinois was on the hook for two-thirds of those salaries. Thompson originally proposed paying all of the state's share, then decided that locals should pick up the tab and not the state. The General Assembly negotiated a deal with the governor to pay 80 percent of the required funding. But Thompson turned around and vetoed the entire appropriation.
The state's attorneys all of a sudden weren't getting a paycheck and threatened to sue, county governments were enraged at having this financial hardship dumped on them, and the General Assembly worked itself into an uproar over Thompson's decision to break their deal.
Caught between a rock and a hard place, Thompson made an unprecedented move and simply declared that he'd "unvetoed" the appropriation. Democratic Comptroller Roland Burris announced that he would recognize the "unveto" as legitimate and go ahead and pay the state's attorney salaries.