apparent murder. president trump says he spoke to king salman on sunday and seems to be accepting his denials. >> the king firmly denied any knowledge of it. he didn't really know -- maybe i don't want to get into his mind. it sounded to me like maybe it could have been rogue killers. who knows? all i can do is report what he told me. he told me in a very firm way they had no knowledge of it. he said it very strongly. it sounded like he and also the crown prince had no knowledge. >> after that rogue killer theory, connecticut senator chris murphy accused the president of being the pr agent of the saudis. let's talk about this with princeton university historian julian zelizer. >> good morning. >> let's talk about what can be done. marco rubio says congress will