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 controversial law, which was last used during World War II.

Mixed-status families in Arizona face fears of separation. A Donald Trump presidency could exacerbate that. Nationwide, 22 million people live in mixed-status households, including over half a million in Arizona, according to estimates from FWD.us, an immigration advocacy group.