This seminar will explore the American experience in reconciling the conduct of an activist foreign policy with the constitutional requirement for power-sharing between Congress and the President. Focusing mainly on the period since World War II, it will review experiences in both economic and security issues, including war powers, arms sales, trade negotiations, and foreign aid. Particular attention will be given to the impact of “extraconstitutional“ procedural innovations, like the War Powers Resolution of 1973, the various arrangements for powersharing on trade, and the legislative veto.