in special counsel robert mueller's investigation. >> was president trump obstru obstructing justice? >> possibly. there is some evidence. >> what will it mean if president trump tries to fire robert mueller? >> it would, i hope, set off alarm bells, that this is his most serious attack on the rule of law. >> reporter: when asked if trump should be impeached? >> i hope not. i think impeaching and removing donald trump from office would let the american people off the hook. people need to stand up and go to the voting booth and vote values. impeachment in a way would short circuit that. >> reporter: comey comparing the behavior of the president to a mob boss. saying he repeatedly demanded loyalty. >> he said i expect loyalty. i need loyalty. i just stared at him and this narrative with myself inside saying don't you move. don't you dare move. don't blink.