>> back then you could say he had money to lose but there was always money to fall back on. now he has the presidency, a place that maybe he thought deep down he would get to but nobody expected him to. how is that affecting the judgment you once knew so well? >> it's physiological first. when you are under stress, you move into this fight or flight state and your prefrontal cortex, your thinking mind shuts down and you become reactive and impulsive. you're about your survival. so you don't think well. trump starts off as you know, not thinking well, he's not reflective, not introspective. he doesn't read and doesn't think things through. now you have a situation in which this is vastly more intense for him, and i think he is in pure reactive mode. >> say impeachment passes and maybe he gets impeached and he doesn't get thrown out and the senate doesn't vote to remove him from office. but he goes along in the last year of his presidency and the polls look terrible for him in the lead-up to 2020 much in the way they did in the lead-up to 2016. what sort of behavior should we expect then? >> i think this is a man who