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Thanks to Jake Gersen, Todd Henderson, Daryl Levinson, Jens Ludwig, Richard McAdams, Tom Miles, Matthew Stephenson, David Strauss, Adrian Vermeule, Noah Zatz, and participants at a workshop at The University of Chicago Law School for helpful comments.

We are grateful to Susan Bandes, Elizabeth Foote, Jacob Gersen, Brian Leiter, Anup Malani, Richard McAdams, Elizabeth Mertz, Jonathan Nash, Eric Posner, Adam Samaha, Larry Solum, David Strauss, Noah Zatz, and participants in a work-inprogress lunch at The University of Chicago Law School for valuable comments. We are also grateful to the Chicago Judges Project, and in particular to Dean Saul Levmore, for relevant support.

Deep thanks to Professors Miles and Sunstein for sharing their draft with me in time to permit this response, and to the editors of The University of Chicago Law Review for agreeing to print it in the same issue.

We thank Eric Posner, Richard Posner, Peter Strauss, and Adrian Vermeule for helpful comments. We are also grateful to Rachael Dizard, Casey Fronk, Darius Horton, Matthew Johnson, Bryan Mulder, Brett Reynolds, Matthew Tokson, and Adam Wells for superb research assistance.

The authors would like to thank Jason Friedman, Ben Schaye, and Grace Tabib for excellent research assistance. The authors also thank participants in workshops at Harvard Law School, Yale Law School, and the University of Minnesota School of Law for helpful comments.

We are thankful for comments from workshop participants at the American Bar Foundation, the National Bureau of Economic Research, and The University of Chicago; and from Douglas G. Baird, Richard Brooks, David Gerber, Lani Guinier, John Heinz, Bill Kidder, Richard Lempert, Tracey Meares, Randall Picker, Eric Posner, Max Schanzenbach, Stephen M. Shavell, David Weisbach, Justin Wolfers, and Robert Yalen. We thank the Andrew W. Mellon Foundation for financial support.We alone are responsible for the contents and for all remaining errors.

I wish to acknowledge a general debt of inspiration to Mark Tushnet’s studies of political controls on emergency powers, although my views differ from Tushnet’s. See generally, for example, Mark Tushnet, The Political Constitution of Emergency Powers: Some Lessons from Hamdan, 91 Minn L Rev 1451 (2007); Mark Tushnet, The Political Constitution of Emergency Powers: Parliamentary and Separation-of-Powers Regulation, 3 Intl J L in Context 275 (2008). For helpful comments, thanks to Jack Goldsmith, Eric Posner, Philip Rumney, Matthew Stephenson, Cass Sunstein, Mark Tushnet, workshop participants at Harvard Law School, and participants at a conference held at Harvard Law School to discuss Cass R. Sunstein, Worst-case Scenarios (Harvard 2007). Thanks to Elisabeth Theodore and Jennifer Shkabatur for helpful research assistance.