I found I wasn't asking good enough questions because I assumed I knew something. I would box them into a corner with a badly formed question, and they didn't know how to get out of it. Now, I let them take me through it step by step, and I listen.
'Favoritism' is always a factor, and pressure always build for the appointment of friends of influential supporters of the President, or for the nominees of powerful Member of Congress from the incoming President's party.