From Lawfare, December, 2017: Emergencies Without End: A Primer on Federal States of Emergency

By a second-year Harvard Law student; watch this site in the coming days to see what opinions they provide on this issue. The site specializes in law and national security, and is headed up by Benjamin Wittes, noted Trump hater. As am I and anyone rational--but they have had a variety of decent articles despite presumed bias. For instance, they are honest about no collusion having yet been proven, at all.

Dig it.

It may well be that the Congress handed over this power in a way that everyone must find Trump's action legal. That may very well be the case: they long since handed over warmaking powers, after all. We shall see.