Presidential Power in an Age of Terrorism is a provocative teaching instrument that uses law, history, and politics to test what the law arguably “is” against assertions of what it “ought” to be. It examines the questionable impulses of presidents, members of Congress, the military, and intelligence agencies to bend or break the Constitution and the laws. In questioning the legitimacy of raw assertions of unaccountable power, the editors reject both the illustrative case approach of political scientists and precedent-driven approach of lawyers, supplementing key court cases with historically-rich essays, notes, and questions. These essays explain where our nation's “first principles” came from, and why they became imbedded, at least until recently, in our laws and institutions. Above all, these materials will prompt the reader to ask how, and by what authority, presidents, Congress, and even courts have come to allow the military and secret agencies to kidnap, torture, assassinate, or secretly detain citizens or aliens, and to use military and para-military force without running afoul of the Constitution and its Bill of Rights.