Which ultimately doesn't matter. If the president tries to do something, and no court actually stops him, then it doesn't matter whether or not it's in the Constitution, whether or not it's written down in law, or whether or not it has been litigated in the past. He tried to do it, nobody stopped him, therefore he can do it.

We are finding out in real time that the president can actually do a lot of things, simply because nobody is stopping him.