Most/all military leadership who are not sympathetic to the Obama doctrine have been purged.
That most likely is a valid assumption, in re the highest level of command. I am thinking more in local terms; local as in where you and I and millions of others can be found.
Perhaps the more important distinction is the percentage of the officer corps that naturally supports the pro-left, lawlessness of the present administration. How badly must the admin misapply the laws and the Constitution before the oath the officers took to support the Constitution kicks in.
Would suspending elections, for the first time in history trigger a response?
I am confident that most realize there is no law or authority, or even unforeseen circumstance, that allows one to continue to occupy the Oval Office at the end of 8 years.