mitch mcconnell said as much last night. he's been saying that for weeks. he doesn't expect any republican defections at the moment. there are some republican senators including mitt romney who told me this week that he's keeping an open mind on whether or not to convict the president. but of course you need 20 republican senators to do just that. if all 47 democratic senators were to vote to remove the president from office, at the moment 20 let alone one seems unlikely -- highly doubtful and first, though, wolf, the question is how many house republicans vote to impeach the president next week. and talking to republican congress men, including moderates, they are signaling they're going to vote with the president so expect total unity from house republicans in defending the president. >> manu raju up on capitol hill. stand by. let's get more on these historic developments. sara murray is with us. sarah, this will continue to be a bitter partisan battle. >> that is right. we saw it play out last night and again today. there were hours of debate.