For example, in Youngstown Sheet & Tube Company v. Sawyer the Court ruled that the President could not seize and operate the nation's steel mills during a strike, even though these were critical to the Korean War effort. By contrast, merely moving around funds already authorized but not allocated is not likely something the Court would be concerned with, especially given the incredible amount of money authorized by Congress that is already wasted (say $3.5 B on a bullet train to and from a couple small towns in California). However, seizing guns in violation of the 2nd amendment, or closing the nation's gas stations or euthanizing libertarians would probably not pass SC muster, especially THIS Court.