"...he has no authority to invoke the Alien Enemies Act without Congressional approval." Apparently, that's not correct if an invasion has occurred. Grok: "The Alien Enemies Act (codified today under 50 U.S.C. §§ 21–24) does not require Congressional approval for the President to invoke it, but it does require a specific condition: a declared war by Congress or an actual invasion or predatory incursion by a foreign nation or government against the United States." I get that Grok gets a lot wrong, but Grok does go into a very detailed multi-paragraph discussion about this. The President declared an invasion has occurred in one of his very early EOs, and then, invoked the Aliens act specifically, as we all know, a few days ago.