U.S. foreign policy can be complex and difficult to understand. In this episode of Update-1, George Washington University political science professor Dr. Henry Nau discusses his book, "Perspectives on International Relations," with NPC Broadcast/Podcast team member Lincoln Smith. Dr. Nau provides an understandable synthesis of the world of foreign policy, and talks about the approaches used by Presidents Clinton, Bush, Obama and Trump. He also offers predictions about American foreign policy in the future.