The Alien Enemies Act is a wartime authority that can be used against any noncitizen from a country at war with the United States, regardless of whether they are in the country legally or not. Its use here for immigration enforcement purposes is flagrantly unlawful.

@alaynatreene w/ @priscialva: The Trump administration is preparing to invoke a sweeping wartime authority -- the Alien Enemies Act of 1798 -- to speed up the president's mass deportation pledge, according to multiple sources familiar with the discussions (CNN.com)