He didn't appear to be doing a particularly great job - partly since he was somewhat bought into the "disruptive" agenda Donnie was peddling which unsurprisingly caused all the ones you want to stay to leave ASAP and of course not having Congress et al bought into the concept of a State Department that was 1/3 the size of what it was. There probably were changes that could be made, but "leadership" is supposedly taking others along with you.

But even with all the wilful damage and disruption he was creating, he still made the carnal sin of making Donnie look like a prat. Not falling foul of this requires someone with all the freedom of thought of a cult member who is happy for history to be rewritten one tweet at a time.

No idea about the new person but Donnie is currently saying how they are really good, close friends who he knows really well. In six months time he'll be denying he every did more than meet him twice in meetings and he too is too much "establishment" which apparently code for "refuses to believe that this is all some sort of reality show on MTV".