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Costs of War
May 5, 2026
Tags Elizabeth Beavers
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Terrorizing Migrants: Five Ways Post-9/11 Legal Precedents Paved the Way for Anti-Immigrant Actions in the United States

Paper

Elizabeth Beavers (Assistant Professor of Law, Delaware Law School at Widener University) argues that the Trump administration’s anti-immigrant policies are enabled by practices created, tested, and normalized by all three branches of government on a bipartisan basis in the post-9/11 era. This report looks at five legal precedents borrowed from the so-called “War on Terror” that have helped the government ramp up aggressive immigration enforcement efforts to surveil, detain, harass, and deport foreign nationals inside the United States.

Photo of Barbed Wire at Guantanamo Bay Naval Base.
In this August 29, 2021, file photo reviewed by U.S. military officials, a flag flies at half-staff as seen from Camp Justice in Guantanamo Bay Naval Base, Cuba. (AP Photo/Alex Brandon, File)

The five legal precedents examined in this report are:

  • Conflation of immigration enforcement and counterterrorism;
  • Expanded and politicized “terrorist” designation lists;
  • Deporting people as “terrorists” without proving actual violent conduct;
  • Indefinite detention, torture, and rendition of noncitizens; and
  • Anti-democratic concentration of executive national security powers.

The report notes that since the earliest days after the attacks of September 11, 2001, Congress has created and expanded presidential powers to designate, detain, and deport people the administration unilaterally determines to be “terrorists.” Additionally, officials have long constructed programs and policies to surveil, harass, detain, torture, and deport nonwhite noncitizens on the premise that they are inherently suspicious, without actual evidence of wrongdoing. Neither Congress nor the courts have meaningfully checked presidents or held them accountable for their expansive claims of war authorities, national security powers, and counterterrorism mechanisms to justify discriminatory practices against noncitizens and especially against people of color.

About the Author

  • Elizabeth Beavers

    Elizabeth Beavers

    Assistant Professor of Law, Delaware Law School at Widener University
    erbeavers@widener.edu
    Website

    Elizabeth serves as Assistant Professor of Law at Delaware Law School, and her scholarship is focused on critically interrogating national security legal structures and institutions, examining ways in which they have the effect of servicing expansive U.S. militarism and hegemony, assessing how they intersect with protected rights and liberties, and exploring both the power and the peril inherent in the law as a tool of accountability for abuses in the name of security. Previously, Elizabeth taught remotely as an adjunct professor of counterterrorism law at the University of New Hampshire’s Franklin Pierce School of Law.

    Before embracing full-time teaching and scholarship, Elizabeth spent more than a decade as a public interest lobbyist in Washington, D.C. She led law and policy advocacy work both in-house and as a consultant at organizations like Public Citizen, Brown University’s Costs of War Project, Indivisible, Amnesty International USA, the Quincy Institute for Responsible Statecraft, Charity and Security Network, and the Friends Committee on National Legislation (Quakers). Her analysis has been featured in numerous media outlets including The New York Times, USA Today, Politico, Reuters, and The Guardian. She has also published several original works of scholarship in prominent law journals.

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Providence RI 02912 401-863-1000

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Terrorizing Migrants: Five Ways Post-9/11 Legal Precedents Paved the Way for Anti-Immigrant Actions in the United States