DRI – The Voice of the Defense Bar has urged the U.S. Supreme Court to review a Sixth Circuit ruling that left intact a federal district court’s certification of two classes in the Polyurethane Foam Antitrust Litigation. DRI’s amicus brief, submitted by DRI’s Center for Law and Public Policy, focuses on the Supreme Court’s jurisdiction to review the district court’s class-certification ruling prior to trial even though the court of appeals denied the defendants’ petition for interlocutory review under Federal Rule of Civil Procedure 23(f).