Colin Dueck is a Professor in the Schar School of Policy and Government at George Mason University, and a non-resident fellow at the American Enterprise Institute. He studied politics at Princeton University, and international relations at Oxford under a Rhodes scholarship. He has published three books on American foreign and national security policies, The Obama Doctrine: American Grand Strategy Today (Oxford 2015), Hard Line: The Republican Party and U.S. Foreign Policy since World War II (Princeton 2010), and Reluctant Crusaders: Power, Culture, and Change in American Grand Strategy (Princeton 2006.) Dueck has provided congressional testimony and published articles on these same subjects in journals such as International Security, Orbis, Security Studies, Review of International Studies, Political Science Quarterly, and World Policy Journal, as well as online at RealClearPolitics, National Review, Foreign Affairs, The National Interest, War on the Rocks, and the New York Times. His current research focus is on the relationship between party politics, presidential leadership, American conservatism, and U.S. foreign policy strategies. He has worked as a foreign policy adviser on several Republican presidential campaigns, and acted as a consultant for the Department of State, the Department of Defense, and the National Security Council. His latest book is Age of Iron: On Conservative Nationalism (Oxford University Press, forthcoming autumn 2019.)