I am a professor of international law and political science at Yale University and the president-elect of the American Society of International Law.  I took leave from Yale to serve for a year as Special Counsel to the General Counsel at the U.S. Department of Defense (with TS/SCI clearance), and I have served as a member of the Advisory Committee to the Legal Adviser at the U.S. Department of State for more than twenty years. I write and teach about a variety of topics in international law, national security law, and foreign relations law. Here you will find my latest work. Please subscribe if you are interested in updates when I post something new.