According to Carl Schmitt, constitutional law and international law are analogous in that they are both forms of political law. Schmitt concludes that neither is open to legitimate judicial enforcement. This paper critically explores Schmitt’s analogy between constitutional and international law. It argues that the analogy can be turned against Schmitt and contemporary sceptics about international law: Since we no longer have any reason to deny the judicial enforceability of domestic constitutional law, the analogy now suggests that there is no reason to think that legitimate judicial enforcement of international law is impossible.