CHRIS HAYES (HOST): It's been interesting to watch folks, allies I would say, political allies of the president begin to sort of circulate the idea the Mueller is essentially a partisan hack. That he's a hatchet man and that he's compromised. And as someone, I guess, at the Justice Department during the Bush administration, Mueller was the FBI director at the earliest parts of the war on terror. What do you make of that characterization? 

CARRIE CORDERO: I think it's absolutely despicable. Bob Mueller has been a, he was actually a Republican Bush administration transition official as either the acting attorney general or the deputy attorney general and then he was confirmed as FBI director. He has a stellar reputation. He is unquestioned in his integrity. He led the FBI during an incredible transition after the September 11th attacks. I saw Director Mueller on the floor of the FBI strategic operations center on the day and the days after September 11th. And I really just can't believe that there are Republican politicians who are out there trying to, in some way, insinuate that he is a partisan actor.

Previously:

Right-wing media attack FBI Russia probe special counsel Robert Mueller

CNN's Jake Tapper calls out conservative media for attacking Robert Mueller after once praising him

On CNN, Angelo Carusone explains the three ways conservatives reacted to Comey´s testimony