Alien Enemies Act of 1798

Wartime statute still used in 2025.
50 U.S.C. §21 lets the President detain and remove natives/citizens of a hostile nation or government during a declared war or an invasion/predatory incursion. [1]
Before 2025, presidents invoked it in the War of 1812, World War I, and World War II — a historical pattern Sotomayor’s J.G.G. dissent stresses. [2]
Bottom line Historical
Text requires war or invasion/predatory incursion by a foreign nation/government — the 2025 fight is whether TdA/Venezuela fits.
What the record can’t settle
Does not itself decide any individual’s gang membership.
Sources
- 50 U.S.C. §21 — Alien Enemies Act (Rev. Stat. §4067) Primary wartime statute: declared war, or invasion/predatory incursion by a foreign nation/government; detention and removal of alien enemies.
- Sotomayor, J., dissenting — Trump v. J.G.G. Dissent recounting Mar 15 flight chronology and CECOT harm allegations; factual narrative for process history, not a majority holding on invasion.

















