me suggested was that if democrats tried to impeach him it would create a precedent and apparently he didn't think this was true after bill clinton. it would create a precedent where every future president, u.s. president, if the opposing party took control of the house would then face impeachment. and he didn't think democrats would want to do that. >> all right. i want you to stick right there, please, margaret. i want to bring in cnn political commentators joan walsh, david swerdlick, michael d'antonio author of "the shadow president:spt truth about mike pence." good evening to you guys. i want to start with you first, david, though. let's start with president trump's assertion that robert mueller's investigation is illegal. do you think he's feeling some sort of pressure? >> i think he's feeling pressure and i think this week, the last week or two, he and his team have been throwing out different theories to see if any of them stick. the idea that the mueller investigation is illegal doesn't