Testing the Limits

Andrew E. Busch is a professor in the Howard H. Baker, Jr. School of Public Policy and Public Affairs and associate director of the Institute of American Civics at the University of Tennessee.

Iwan Morgan is Professor of US Studies emeritus at the Institute of the Americas, University College London, UK. He is also a distinguished fellow of the Rothermere American Institute, University of Oxford, UK. He was the recipient of the British Association of American Studies Honorary Fellowship in 2014, and winner of the Richard Neustadt Book Prize in 2010. He is the author of Reagan: American Icon (2016), named by The Times/Sunday Times as a Politics Book of the Year.

JOHN YOO is one of America's best-known conservative constitutional scholars. He is currently the Emanuel S. Heller Professor of Law at the University of California, Berkeley, a visiting fellow at the Hoover Institution, Stanford University, and a visiting scholar at the American Enterprise Institute. Previously, he served as an official in the U.S. Justice Department during the George W. Bush administration, general counsel of the U.S. Senate Judiciary Committee, and as a law clerk to U.S. Supreme Court Justice Clarence Thomas. He has written several books on American foreign policy and the power of the executive branch--including The Powers of War and Peace and Crisis and Command--and is a frequent guest on television programs.

Mark J. Rozell is dean of the Schar School of Policy and Government at George Mason University. He also holds the Ruth D. and John T. Hazel chair in Public Policy.