"Unless you go the full totalitarian, and run a private security state"
That is not the nuclear option.
That would be the 1 clause act suspending The Senate and Congress and instituting direct rule from the Oval Office.
IOW "Thank you for your service but if you're not in the Cabinet you're not needed. Please vacate the building in the next hour. "
But no one would be megalomanical enough to do that in the 21st century in the most powerful country on the planet, right?