Demystifying Nationwide Injunctions

54 Pages Posted: 3 Dec 2018 Last revised: 20 Nov 2019

See all articles by Alan M. Trammell

Alan M. Trammell

University of Arkansas - School of Law

Date Written: November 26, 2018


The phenomenon of nationwide injunctions — when a single district court judge completely prevents the government from enforcing a statute, regulation, or policy — has spawned a vigorous debate. Scholars overwhelmingly reject this practice, arguing that an injunction should benefit only the actual plaintiffs to a lawsuit and should not apply to persons who were not parties. These critics root their arguments in various constitutional and structural constraints on federal courts, including due process, judicial hierarchy, and inherent limits on “judicial power.” This Article shows why these arguments are not persuasive.

This piece offers one of the few defenses of nationwide injunctions and is grounded in a unique theory deriving from preclusion. A rich and nuanced preclusion jurisprudence has developed to answer the very question that the current debate raises: who should be bound by the results of litigation? Preclusion principles help explain why there are no constitutional or structural impediments to courts’ power to issue a nationwide injunction. These principles also reveal the circumstances under which such an injunction is (and is not) appropriate. Specifically, they suggest that while a nationwide injunction should not issue as a matter of course, it is permissible when the government acts in bad faith, including most notably when government officials fail to abide by settled law.

Keywords: nationwide injunctions, universal injunctions, national injunctions, equity, preclusion, nonmutual preclusion, Mendoza, nonacquiescence, bad faith

JEL Classification: K10, K23, K30, K4, K40, K41, K42

Suggested Citation

Trammell, Alan M., Demystifying Nationwide Injunctions (November 26, 2018). 98 Texas Law Review 67 (2019). Available at SSRN: or

Alan M. Trammell (Contact Author)

University of Arkansas - School of Law ( email )

260 Waterman Hall
Fayetteville, AR 72701
United States
479-575-2655 (Phone)


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