re: #3 Blind Frog Belly White
There’s that, but I think beyond that, Trump doesn’t want to feel that ANYONE has any power to limit or contest his actions and choices. The more “Acting” Secretaries he gets away with, the more “Advise and Consent” becomes irrelevant.
This is my worry - that the GOP is governing as if there will never be another Democratic President and/or Democratic President, because they seem completely unconcerned about any of the precedents they’re setting coming back to bite them in the ass.