President Trump invoked the Alien Enemies Act of 1798 against Tren de Aragua members, provoking a legal fight. Here's what to know about the... As part of his efforts to crack down on immigration, ...

What is the Alien Enemies Act? It's an 18th-century law that allows the president to detain or deport immigrants from countries the U.S. is at war with. In more than 225 years, the law had been ...