This article discusses covert action within the context of the U.S. law. The first section describes the main elements of the U.S. legal regime, including the definition of covert action and the “traditional activity” exceptions, the elements of a covert action finding, and the thresholds and requirements for congressional notification. The second section describes some of the significant limitations on the conduct of covert action. The third section discusses the nature of executive branch legal practice in this area of the law. And the last section draws conclusions about the role of national security law within the context of covert action.