Earlier this week the US Court of Appeals for the Fifth Circuit decided to grant an en banc rehearing in W.M.M. v. Trump. The panel decision in that case ruled that Trump's invocation of the Alien Enemies Act of 1798 was illegal, because illegal migration and drug trafficking and other activities of the Venezuelan drug gang Tren de Aragua do not qualify as a war, "invasion," or "predatory incursion." The AEA can only be used to detain and deport immigrants when one of these extraordinary conditions, or a threat thereof, exists.The case will now be reheard by all 17 active Fifth Circuit judges.

In an amicus brief I coauthored in the case on behalf of the Brennan Center, the Cato Institute, and others, we argue that "invasion" and "predatory incursion" require a military attack, and that co

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