coming up for the excuse for firing comey. >> there is a constant concern among the president's advisers of the people around the president flipping on him. there is a fear that these people are going to flip on him but the never gets back to what are they flipping on him for? clearly there is a fear there. the question that bob mueller is trying to figure out is what is the fear and is there valuable information that they can turn over? >> why didn't he say donald trump would be interested in bringing this investigation to a close? i know rudy giuliani argues that. they need to keep this going. if trump refuses to speak with mueller he puts mueller in a position of i'm going to subpoena the president. why would you subpoena the president if you are not going to indict him? mueller might write his report and we know donald trump will write his report. >> his son could get wrapped up