Neil S. Siegel

David W. Ichel Professor of Law

External Address: 
Duke Law School 210 Science Dr, Duke Box 90362, Durham, NC 27708
Internal Office Address: 
Duke Law School Room 3178, Duke Box 90362, Durham, NC 27708
(919) 613-7157
American Politics

Neil S. Siegel is the David W. Ichel Professor of Law and Professor of Political Science at Duke Law School, where he also serves as co-director of the Program in Public Law and director of the DC Summer Institute on Law and Policy. Professor Siegel’s research and teaching fall in the areas of U.S. constitutional law, constitutional theory, and federal courts.
Professor Siegel’s scholarship addresses a variety of areas of constitutional law and, in doing so, considers ways in which a methodologically pluralist approach can accommodate societal changes while remaining disciplined and bound by the rule of law. His articles on collective action federalism offer constitutional justification for robust, but not limitless, federal power. His Fourteenth Amendment work examines competing mediating principles of equality and identifies ways in which equality values are protected under both equal protection and substantive due process. His writings on constitutional politics and judicial statesmanship seek to understand how participants in the practice of constitutional law can vindicate the conditions for the legitimacy of constitutional law. His contributions in the area of separation of powers document and justify the role of historical practice in partially constituting executive and judicial power, especially when such practice is considered along with structural constitutional concerns. And his constitutional theory scholarship analyzes how perceptions of the clarity or ambiguity of the constitutional text are affected in part by purposive, structural, historical, doctrinal, and consequentialist considerations.
Professor Siegel teaches Duke Law students, undergraduates in Duke University’s Trinity College and in Duke Law’s DC Summer Institute, and judges in Duke’s Master of Judicial Studies Program. Throughout the year, he offers U.S. Supreme Court updates and other talks at judicial conferences and law firms around the country.
Professor Siegel served as special counsel to Senator Joseph R. Biden during the confirmation hearings of John G. Roberts and Samuel A. Alito. During the October 2003 term, he clerked for Associate Justice Ruth Bader Ginsburg at the U.S. Supreme Court. He also served as Bristow Fellow in the Office of the Solicitor General at the U.S. Department of Justice during the tenure of Solicitor General Theodore B. Olson, and as law clerk to Judge J. Harvie Wilkinson III of the U.S. Court of Appeals for the Fourth Circuit.
In 1994, Professor Siegel received his B.A. (Economics and Political Science), summa cum laude, from Duke University. In 1995, he received his M.A. (Economics) from Duke University. He graduated in 2001 with joint degrees from the University of California, Berkeley, receiving his J.D. from Berkeley Law and a Ph.D. in Jurisprudence and Social Policy. While at Berkeley Law, he served as the Senior Articles Editor of the California Law Review.


  • Ph.D., University of California at Berkeley 2001
  • J.D., University of California at Berkeley 2001
  • M.A., Duke University 1995

Siegel, N. "More Law than Politics: The Chief, the "Mandate," Legality, and Statesmanship." The Health Care Case:The Supreme Court's Decision and Its Implications. 2013. 192-214. (Chapter)

Siegel, N. "Reciprocal Legitimation in the Federal Courts System." Vanderbilt Law Review 70 (2017): 1183-1247.

Siegel, N, and Bradley, C. "Historical Gloss, Constitutional Conventions, and the Judicial Separation of Powers." Georgetown Law Journal 105 (2017): 255-322.

Siegel, N, and Cooter, R. "Coercion and Collective Action (In preparation)." (2016).

Siegel, N, and Bradley, C. "Constructed Constraint and the Constitutional Text." Duke Law Journal 64.7 (2015): 1213-1294.

Siegel, N, and Siegel, R. "Contraception as a Sex Equality Right." Yale Law Journal Forum 124 (2015).

Siegel, N, and Siegel, R. "Compelling Interests and Contraception." Connecticut Law Review 47.4 (2015): 1025-1043.