sam is saying the president knew about it. they have all said he didn't. we're going to talk to him about all of these accusations and the evidence he has. sarah sanders was asked about sam nunberg and tried to shut him down. >> just said on msnbc moments ago i think he, meaning the president, may have done something during the election but i don't know that for sure. your reaction. >> i definitely think he doesn't know that for sure because he's incorrect. there was no collusion with the trump campaign. anything further on what his actions are, he hasn't worked at the white house. i can't speak to him or the lack of knowledge that he clearly has. >> sam will be here in just a moment. how are white house officials responding to nunberg's comments and the point he's making behind the scenes tonigh