The act is a wartime authority that allows the president to detain and deport non-U.S. citizens from enemy countries.

President Donald Trump is expected to use an 18th-century law, the Alien Enemies Act of 1798, to hurry along his mass deportation effort. Trump has made deporting illegal immigrants, especially members of criminal organizations such as Tren de Aragua,

President Donald Trump is expected to invoke the Alien Enemies Act, a wartime law granting the president authority to detain or deport nationals of an enemy country, two U.S. officials familiar with the matter told ABC News.