So who is this Mulder guy? R or D?
He was head of the FBI from 2001 to 2013, he was the director before Comey. He got asked to stay for 2 extra years before Comey ended up becoming the FBI director while under Obama. He has a unanimus passage through Senate confirmation 98-0. Unless he has some twisted ties after he left he seems like about as good a pick as you can find for this job. He and Comey both were involved in opposition to the Ashcroft/Gonzalez fiasco in the Bush years and were on the same page.