On May 1, Justice Amy Coney Barrett directed the State of Illinois and the City of Naperville to respond to the emergency application for injunction pending appellate review filed by the National Association for Gun Rights (NAGR). As I explained in "An Opening Judicial Salvo in Defense of Illinois' New Rifle Ban," the U.S. district court (N.D. Ill.) denied a motion for preliminary injunction against the State's ban on semiautomatic rifles and standard-capacity magazines, greatly departing from Supreme Court precedent on the Second Amendment.
While that denial was being appealed to the 7th Circuit, Judge Stephen McGlynn (S.D. Ill.) found that plaintiffs in another challenge were likely to succeed on the merits that the law violates the Second Amendment, and he issued a preliminary injunction against enforcement. See my post. The 7th Circuit immediately granted the State's motion for a stay against the injunction in a one-sentence order without giving the plaintiffs an opportunity to respond.
So now the challengers have filed amicus briefs supporting NAGR in the Supreme Court, and we await a decision there.