this new nbc news/"wall street journal" polls ben carson six points ahead of donald trump. trump's numbers have been relatively flat over that time. this is the second national poll that shows trump trailing carson. this morning on abc he took a swipe at the new leader. >> ben doesn't have the experience. i'm going to make the greatest deals you've ever seen on trade. we're going to run the military properly. i'll take care of the vets. ben cannot do that. ben cannot deal on trade -- >> why not? >> it's not his thing, george. you're born with it. it's not his thing. he hasn't got the temperament for it. >> that news conference from donald trump expected to begin any minute. our political reporter sara murray outside trump tower waiting for it all. what do we expect to hear? >> reporter: donald trump is going to try to sell some books today. you see the people lined up behind me. that's part of it. we're also get a sense of how