so i think republicans are probably going to need really hard evidence and bob mueller, as far as everyone can tell, is really going to be looking for that hard evidence. that's why we see the president saying, wow, i didn't know ag bill barr really liked mueller as much as he did. i didn't know they went back for a far. but it's because barr sees mueller and says, he's a credible person. he's someone who will take this job very seriously. and as a result, if mueller does find something, you can definitely bet he's going to have evidence to back it up. >> well, the trouble is for all of these republicans, if they look to the future, they must realize that donald trump is not likely to go to mt. rushmore. he's much more likely to go back to trump tower. and their question should be right now, do you want to go there with him? thank you very much, u.s. congresswoman, katie hill of the house overnight committee, thank, harry litman and yamiche alcindor of pbs. coming up, 48% of registered voters -- actually, 46% of registered voters and 88% of republican voters believe that president trump is doing a good job. can anything that come out of these investigations weaken the gop support for trump?