Attorneys Adolfo Mondargon (left) and Michael Dorf sparred before the Illinois Supreme Court over campaign finance law on Wednesday.

The Illinois Supreme Court met on Wednesday to hear an appeal from Ald. Byron Sigcho-Lopez (25) challenging the legality of the $220,000 in campaign contributions spent by his predecessor  Ald. Danny Solis on legal fees during the ongoing corruption investigation around Ald. Ed Burke (14). If the high court sides with Sigcho-Lopez, it will mark a sea change in the rules surrounding how campaign dollars are used statewide.