undermine mueller as his investigation ramps up and give trump cover should be remove mueller. as to mccabe he is a critical person and runs the day-to-day operations of the fbi and he was also a key person overseeing the hillary clinton investigation. her use of a private email serve every and just this past week, he spent over 16 hours on the hill before congress testifying before three congressional committees about the clinton and russia variatioinvestigations. we have done reporting on that and we learned he backed up some of what the former fbi director said about his conversations with the president. he was also questioned extensively about his role in the hillary clinton investigation. let's talk to cnn political commentator errol louis and nathan gonzalez.