Rob: a big day for big tech, the hot seat on capitol hill. executives from facebook and twitter will answer questions about efforts to crack down on disinformation campaigns. tim summers said he is looking for real answers. >> we don't want to see a repeat of what we find previous hearings when margaretta berg came to talk about it. we are looking forward to seeing a bit more pressing about how executives will handle the situation. rob: twitter warns it could kick donald trump off of social media if he violates the site rules. jillian: many conservatives are ditching facebook over trust issues...