In his latest move to clamp down on illegal immigration and immigration more broadly, President Trump has filed a presidential action invoking the Alien Enemies Act of 1798, a seldom-used law that gives the president authority to detain or deport nationals of an enemy nation during wartime. It’s only the fourth time in American history a president has used the act — and the first since World War II.
The courts have put a pause on this for now at least. They don’t have a mechanism of enforcement though, so theoretically Trump can just ignore them. We’ll have to wait and see what they do I guess. Hopefully they aren’t willing to directly contradict the courts yet.