Citigroup, Inc. v. Abu Dhabi Investment Authority

HALL, Circuit Judge:

This case presents the question of whether the All Writs Act, 28 U.S.C. § 1651(a), permits a federal district court to enjoin a second arbitration between parties to a contractual arbitration agreement based on what one party asserts is the claim-preclusive effect of a prior federal judgment confirming the result of the parties’ earlier arbitration. We hold that the “extraordinary remedies” authorized by the All Writs Act cannot be used to enjoin an arbitration based on whatever claim-preclusive effect may result from the district court’s prior judgment when that judgment-…