On March 7, Illinois told the U.S. Supreme Court that it doesn’t plan to respond to the ballot access cert petition filed by the Green Party. The Green Party challenges the petition requirements for nominees of unqualified parties to get on the November ballot. Those rules are so stringent, Illinois was one of only three states with no minor party legislative candidates on the ballot in 2016. The case is Tripp v Scholz, 17-1129.
Of course, if the Court wants Illinois to file a response, Illinois will then do so.