"American Foreign Policy and the Challenges of World Leadership provides a unique perspective on U.S. foreign policy, emphasizing the constitutional issues that emerge during the foreign policy process in an accessible and clearly written manner."--John G. Oates, The Ohio State University"This is a strong text that emphasizes a unique theoretical presentation, the historical development of actors and processes, and the constitutional constraints and opportunities in American foreign policy, both in the past and the present."--Matthew M. Caverly, University of North Florida