Whether the Illinois Supreme Court's refusal to stay the injunction pending appeal was a final judgment subject to Supreme Court review under 28 U.S.C. § 1257.
Holding
Yes. The denial of a stay was a reviewable final judgment because it conclusively resolved a collateral claim that petitioners would lose First Amendment rights during the appellate process.
Reasoning
Although the underlying validity of the injunction had not yet been decided on appeal, the stay ruling resolved a distinct and urgent question: whether petitioners could exercise the restrained expressive rights while their appeal proceeded. That question was separable from the merits of the injunction itself.
The Court applied the collateral-order principle, reasoning that the refusal to stay finally determined petitioners' claim that the injunction would deprive them of First Amendment freedoms during a potentially lengthy appellate process. Because ordinary appellate review could take a year or more, later review of the injunction's merits would not remedy the loss of speech during that period.