Civics 101 - we are a nation of laws. And the military, which I served in for 29 years, is governed by regulations. Decisions are not based on political expediency. Military officers, sitting on courts martial, do not consult with the President's political advisors before deciding a case. When someone in the military is given a lawful order, and not appearing at a political event is a LONG standing regulation, willfully violating that lawful order must be dealt with, regardless of who you are. Politics has nothing to do with it.
The most chilling thing about Post #93 is that it favors the worst sort of judicial activism.