Where does it lie, with the president, or the Constitution?
I’m very concerned that the president has been replacing officers sworn to the latter with those loyal to him at the top of the chain. In which case things could get very ugly if we have to find out how far down the ranks we have to go to find some loyal to their oath of service.
We saw a smaller-scale version of this with Bill Clinton, when he attempted to prevent his Secret Service agents from providing testimony about his behavior, as though they were some sort of praetorian guard. The potential Constitutional crisis Donald Sensing describes would be much more serious.