that question and he's answered it many times. but what he's not going to do is play by donald trump's rule book. overnight we saw an ap headline that says that rudy giuliani, while they were trying to dig up dirt, they were also trying to make a buck off of ukrainian natural gas contracts. who was surprised to learn that? so i think what we see is that they are going to continue to try to change the subject and we're not going to let them do that. we're going to hold them accountable and remind voters what kind of administration donald trump is running and how it impacts their day-to-day lives. >> so let's talk about those voters. you invoked them and talked about the poll in wisconsin which does show our candidate on top. there's also new polls in iowa showing elizabeth warren is actually the front-runner there. when you are looking at this landscape of polls, are you concerned from the surge for candidates and the slight slump that we've seen in some states for joe biden is an indication that perhaps the president's attacks are working? >> no, not at all.