OK. What is it that Trump/Miller may want to do that is prevented by "our system"? It is pretty clear that the admin is going to ignore the aspects of our constitutional framework that would ordinarily require them to seek the approval of Congress, whether with respect to declarations of war or otherwise, and that the current Congress has no appetite for asserting itself in that regard. If Trump decides tomorrow to send troops into Greenland, or Canada, or Mexico, or whatever, what about our "system" is going to stop them?