E.T. v. Cantil-Sakauye

Whether the abstention doctrine announced in O"Shea v. Littleton requires federal courts to refrain from adjudicating claims under 42 U.S.C. § 1983 whenever it would "intrude" upon state-court administration in any manner, as the court below held in joining the Second and Sixth Circuits, or whether that doctrine requires abstention only when adjudication requires supervising specific state-court events or displacing their "day-to-day operations," as the D.C. and First Circuits have held.