The Chicago Bar Association filed the lawsuit this month claiming the wording of a constitutional question is misleading.
But Chicago Election Board Chairman Langdon Neal argues the state election hangs in the balance.
He says reprinting, then distributing the three million Cook County ballots alone by Election Day would be virtually impossible.
He adds that failure to get the ballot out could undermine everything from the vote for president to voting for judges. And he says the result will be "chaos."
Langdon says his counterparts across the state share that view.
A hearing on the lawsuit is Wednesday in Cook County.