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Joshua Geltzer


Executive Director, Institute for Constitutional Advocacy and Protection, Visiting Professor of Law

Bachelor's Degree, Princeton; J.D., Yale; Ph.D., Kings College London

Joshua Geltzer serves as the founding Executive Director of the Institute for Constitutional Advocacy and Protection as well as Visiting Professor of Law at Georgetown...

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Joshua Geltzer serves as the founding Executive Director of the Institute for Constitutional Advocacy and Protection as well as Visiting Professor of Law at Georgetown University Law Center. He is also a fellow in New America’s International Security program.

Geltzer served from 2015 to 2017 as Senior Director for Counterterrorism at the National Security Council staff, having served previously as Deputy Legal Advisor to the National Security Council and as Counsel to the Assistant Attorney General for National Security at the U.S. Department of Justice. He also served as a law clerk to Justice Stephen Breyer of the U.S. Supreme Court and, before that, as a law clerk to Chief Judge Alex Kozinski of the Ninth Circuit Court of Appeals.

Josh received his J.D. from Yale Law School, where he served as editor-in-chief of the Yale Law Journal, and his PhD in War Studies from King’s College London, where he was a Marshall Scholar. Before that, he attended Princeton University, majoring in the Woodrow Wilson School of Public and International Affairs.

He is the author of US Counter-Terrorism Strategy and al-Qaeda: Signalling and the Terrorist World-View, published by Routledge; and his work has appeared in The Atlantic, Foreign Policy, Parameters, Studies in Conflict & Terrorism, the Journal of Constitutional Law, and the Berkeley Journal of International Law.

Recent Scholarship

Contributions to Law Reviews and Other Scholarly Journals

  • Joshua Alexander Geltzer, Of Suspension, Due Process, and Guantanamo: The Reach of the Fifth Amendment After Boumediene and the Relationship Between Habeas Corpus and Due Process, 14 U. Pa. J. Const. L. 719-780 (2012).    [HEIN] [W] [SSRN] [WWW]
  • Joshua Alexander Geltzer, Decisions Detained: The Courts' Embrace of Complexity in Guantánamo-Related Litigation, 29 Berkeley J. Int'l L. 94-131 (2011).    [HEIN] [W] [SSRN] [WWW]

Book Chapters and Collected Works

  • Joshua Alexander Geltzer, Akhil Reed Amar & Lindsey Ohlsson Worth, Reconstructing the Republic: The Great Transition of the 1860s, in Transitions: Legal Change, Legal Meanings 98-129 (Austin Sarat ed., Tuscaloosa, Ala.: University of Alabama Press 2012).    [BOOK]
View all scholarship

All Scholarship 2011 - Present

Contributions to Law Reviews and Other Scholarly Journals

  • Joshua Alexander Geltzer, Of Suspension, Due Process, and Guantanamo: The Reach of the Fifth Amendment After Boumediene and the Relationship Between Habeas Corpus and Due Process, 14 U. Pa. J. Const. L. 719-780 (2012).    [HEIN] [W] [SSRN] [WWW]
  • Joshua Alexander Geltzer, Decisions Detained: The Courts' Embrace of Complexity in Guantánamo-Related Litigation, 29 Berkeley J. Int'l L. 94-131 (2011).    [HEIN] [W] [SSRN] [WWW]

Book Chapters and Collected Works

  • Joshua Alexander Geltzer, Akhil Reed Amar & Lindsey Ohlsson Worth, Reconstructing the Republic: The Great Transition of the 1860s, in Transitions: Legal Change, Legal Meanings 98-129 (Austin Sarat ed., Tuscaloosa, Ala.: University of Alabama Press 2012).    [BOOK]
Recent scholarship

In the News

 "Trump's voter fraud commission plans to create a massive voter database. Former national security officials say it could be hacked."coverage in The Washington Post, December 5, 2017, featuring Professor Joshua Geltzer.

"Trump Can't Block His Hostile Twitter Followers. It's Against the 1st Amendment," an opinion piece by Visiting Professor Joshua Geltzer and Amy Marshak, Associate from Practice,  Institute for Constitutional Advocacy and Protection (ICAP), in Newsweek, November 7, 2017.

"Trump Blocking Critics on Twitter Violates First Amendment, Professors Claim," coverage in The Christian Post, November 7, 2017,  featuring Visiting Professor Professor Joshua Geltzer.

"First Amendment Advocates Charge Trump Can't Block Critics On Twitter," coverage on NPR, November 7, 2017, featuring Visiting Professor Joshua Geltzer.

"Donald Trump is acting like a dictator by blocking critics on Twitter, law scholars say," coverage in The Independent, November 7, 2017, featuring Visiting Professor Joshua Geltzer.

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All News

 "Trump's voter fraud commission plans to create a massive voter database. Former national security officials say it could be hacked."coverage in The Washington Post, December 5, 2017, featuring Professor Joshua Geltzer.

"Trump Can't Block His Hostile Twitter Followers. It's Against the 1st Amendment," an opinion piece by Visiting Professor Joshua Geltzer and Amy Marshak, Associate from Practice,  Institute for Constitutional Advocacy and Protection (ICAP), in Newsweek, November 7, 2017.

"Trump Blocking Critics on Twitter Violates First Amendment, Professors Claim," coverage in The Christian Post, November 7, 2017,  featuring Visiting Professor Professor Joshua Geltzer.

"First Amendment Advocates Charge Trump Can't Block Critics On Twitter," coverage on NPR, November 7, 2017, featuring Visiting Professor Joshua Geltzer.

"Donald Trump is acting like a dictator by blocking critics on Twitter, law scholars say," coverage in The Independent, November 7, 2017, featuring Visiting Professor Joshua Geltzer.

"Why the First Amendment Constrains Trump's Use of Twitter", coverage in Just Security, November 6, 2017, by Visiting Professor Joshua Geltzer and Amy Marshak.

"Trump shreds norms in response to New York attack," coverage in The Globe and Mail, November 3, 2017, featuring Visiting Professor Joshua Geltzer.

 "Trump Suggests Guantanamo Prison for Truck Attack Suspect, an Unprecedented Step", coverage in The New York Times, November 1, 2017, quoting Visiting Professor Joshua Geltzer

"For Quick and Strong Justice, Look to Courts- Not Guantanamo", coverage in Just Security, November 1, 2017, by Visiting ProfessorJoshua Geltzer

 "Terror in NYC: the Real Test Comes Tomorrow, Not Today", coverage Just Security, October 31, 2017, by Visiting Professor Joshua Geltzer

 "Obama-era uranium deal yields new questions, new accusations and new investigation", coverage in CNN Politics, October 25, 2017, quoting Visiting Professor Joshua Geltzer

"Joshua Geltzer ’05 Brings Government Experience to Constitutional Advocacy," coverage by Princeton Alumni Weekly, October 25, 2017, featuring Professor Joshua Geltzer, executive director, Institute for Constitutional Advocacy and Protection.

"The Arpaio Decision: When the World is Extraordinary But the law is Ordinary", coverage in Just Security, October 20, 2017, by Visiting Professor Joshua Geltzer

 "The Arpaio Decision:When the World Is Extraordinary But the Law is Ordinary", coverage in Just Security, October 20, 2017, by Visiting Joshua Geltzer

 "Struggle Over Kirkuk Puts the U.S. and Iran on the Same Side", coverage in The New York Times, October 18, 2017, quoting Professor Joshua A. Geltzer. 

"Q&A: Lawyers Sue White Supremacist 'Paramilitaries' in Wake of Charlottesville," by the National Law Journal, October 13, 2017, featuring Visting Professors Joshua Geltzer and McCord.

"Q&A: Lawyers Sue White Supremacist 'Paramilitaries' in Wake of Charlottesville," coverage in The National Law Journal, October 13, 2017, featuring Visiting Professors Joshua Geltzer and Mary McCord.

"New Suit Filed in Virginia to Prevent Another “Charlottesville” Paramilitary Rally," an opinion piece by Visiting Professor Joshua Geltzer, in Just Security, October 12, 2017.

"Charlottesville Sues White Nationalist Rally Organizers To Stop Alleged Paramilitary Activity," coverage in BuzzFeed News, October 12, 2017, featuring Visiting Professors Joshua Geltzer and Mary McCord.

"Charlottesville files lawsuit to prevent return of paramilitary groups," coverage on CBS 19 News, October 12, 2017, featuring Visiting Professors Joshua Geltzer and Mary McCord.

"Charlottesville suing to stop private militias at future rallies," coverage on CNN, October 12, 2017, featuring Visiting Professors Joshua Geltzer and Mary McCord.

"Frozen Out of Work on Climate," coverage by Los Angeles Times, October 5, 2017, quoting Visiting Professor Joshua Geltzer.

 "Civil servants charge Trump is sidelining workers with expertise on climate change and environment", coverage in the Los Angeles Times, October 4, 2017, quoting Professor Josh Geltzer

"Donald Trump’s Voter Fraud Commission Just Suffered a Court Defeat," coverage by The Daily Beast, October 4, 2017, quoting Visiting Professor Joshua Geltzer.

"Civil servants decry Trump team’s actionsThey accuse EPA, Interior heads of sidelining experts on climate change," coverage in the Los Angeles Times, September 26, 2017, quoting Visiting Professor Josh Geltzer.

"What Does the New Travel Ban Say About Trump’s Relationship to Judges? Stay Tuned…," a piece by Visiting Professor Joshua Geltzer, executive director, Institute for Constitutional Advocacy and Protection, in Just Security, September 25, 2017.

Just Security announced on September 25, 2017 that Visiting Professor Josh Geltzer, executive director, Institute for Constitutional Advocacy and Protection, has been named one of five new members to their Board of Editors.

 "With DACA, legal debate heats up over executive orders", coverage by WJLA, September 12, 2017, interveiwing Professor Josh Geltzer.

 "Experts: Trump Tower deal risked compromising Trump", coverage in CNN Politics, September 6, 2017, quoting Visiting Professor Joshua Geltzer

"Law Scholars Back Chicago In Sanctuary City Fight With DOJ," coverage by Law 360, September 1, 2017, mentioning Visiting Professor Joshua Geltzer and Daniel B. Rice, Fellow at the Institute for Constitutional Advocacy and Protection.

"Blowing the whistle on Trump's mistreatment of civil servants," a piece co-authored by Robert Friedman, fellow, and Joshua Geltzer, executive director, Institute for Constitutional Advocacy and Protection, in The Hill, August 30, 2017.

"Inside Robert Mueller’s Army," coverage in the Daily Beast, August 24, 2017, featuring Josh Geltzer, Visiting Lecturer.

"Lawyers Launch Initiative To Challenge Executive Power," an interview with Visiting Professors Joshua Geltzer and Mary McCord, and mentions of Professor Neal Katyal, on NPR, August 9, 2017.

"IsIamic State Is Dying on the Battlefield- and Winning on the Internet", coverage in Bloomberg Businessweek, July 20, 2017, featuring Visiting Professor Joshua Geltzer

"Digital weapons that worked against Iran, North Korea miss mark against Islamic State: Officials," coverage by Today (Sing.), June 13, 2017, quoting Visiting Professor Joshua Geltzer.

 "U.S. Cyberweapons, Used Against Iran and North Korea, Are a Disappointment Against ISIS", coverage in The New York Times, June 12, 2017, quoting Visiting Professor Joshua Geltzer

"U.S. Cyberweapons, Used Against Iran and North Korea, Are a Disappointment Against ISIS," coverage by The New York Times, June 12, 2017, quoting Visiting Professor Joshua Geltzer.

 "Manchester Bomber Met With ISIS Unit in Libya, Officials Say", coverage The New York Times, June 3, 2017 featuring Visiting Professor Joshua Geltzer.

Recent News

On The Web

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