The Alien Enemies Act is a war power granted to the president that has only been used four times in US history since its creation in 1798. It allows the president to order the detention and deportation of noncitizens from "enemy" nations during war, invasion, or predatory incursion. When it was created, the US had a very different understanding of Constitutional rights, including due process, than we do today. We talk about how the Alien Enemies Act has been used throughout history, and how Constitutional law has evolved since 1798. 

Helping us out is Liza Goitein. She is the senior director of the Brennan Center’s Liberty and National Security Program. 

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