Dereliction impeachment!1 He forfeited Cmdr-in-Chief duty, created a rogue military. Impeach!1
There's an article out there explaining that to MADISON and his cohorts "high" crimes and misdemeanors as grounds for impeachment refers to "maladministration" specifically in performance of official duties, not to "high" as in severity.
Not to say that this jerk with so many other serious infractions of ignorance, ethics, and fitness misses the mark of *severity* since here he is violating one of the bedrock principles, that the CIVILIANS are in control of the MILITARY.
Even a dweeb like Shrub showed some awareness of this by trying to legitimize himself by getting himself called Commander in Chief as often as possible.
As for this JERK's loosing the military to do as it will, first he called it "my" military, as Rachel?/Tweety? commented on at length, how he seems to believe it is his personal own thing, the way he tried to "give" exclusive rights to the inauguration to the Faux Propaganda Network, being ignorant that the military belongs to the country. And within the military at its best is the insidious kernel of Dr Strangelove, Catch 22, and the military's own self-awareness of FUBAR. It's only a step away from the Romans' praetorian guard running things, choosing emperors.
There is just plain LOTS of stuff to get this JERK out of here. If this institutional ROT were not so ingrained, some "high" (to use another meaning) minded members of the other branches would do their jobs.