I'm glad you posted this because I just assumed he was an ass kisser who climbed the ladder through the bureaucracy. I stand corrected and would apologize to him for that assumption, though not for my opinion about how self serving I believe he has been.
For instance, he has been on CNN multiple times that I've seen. Isn't he the same guy who didn't say a damned thing when Obama sent blankets to Ukraine as they lost Crimea but also felt it "his duty" to be an impeachment witness against Trump who actually sent weapons and angered Russia?
Some consistency of character means a great deal to me, otherwise I look for their political bias or level of compromise for personal benefit.