Federal Jurisdiction. Standing. Legal experts discuss the Supreme Court's broadening of the zone of interest for standing in F.D.A. v R.J. Reynolds Vapor Co. and how predictable downstream economic harm can confer standing on non-regulated parties in Diamond Alternative Energy v. E.P.A. In their analysis of Royal Canin U.S.A. v. Wullschleger, they discuss how the Supreme Court resolved a circuit split by deciding that the removal of federal claims terminates federal supplemental jurisdiction.