Delegating War Powers

Abstract

Academic scholarship and political commentary endlessly debate the President’s independent constitutional power to start wars. And yet, every major U.S. war in the last sixty years was fought pursuant to war-initiation power that Congress gave to the President in the form of authorizations for the use of military force. As a practical matter, the central constitutional question of modern war initiation is not the President’s independent war power; it is Congress’s ability to delegate its war power to the President.

It was not until quite late in American history that the practice of war power delegation became well accepted as a domestic law basis for starting wars. This Article examines the development of war power delegations from the Founding era to the present to identify when and how war power delegations became a broadly accepted practice. As this Article shows, the history of war power delegation does not provide strong support for either of two common but opposite positions: that war power, as a branch of foreign affairs powers, is special in ways that make it exceptionally delegable; or that it is special in ways that make it uniquely nondelegable. More broadly, that record counsels against treating “foreign affairs delegations” as a single category, and it reveals that constitutional questions of how Congress exercises war power are as significant as whether it does.

Keywords: war power, delegation, nondelegation, originalism, historical gloss, commander in chief, AUMF