if you really look at what trump says, people are going to have doubts. the big question here, of course, carol is whether this is going to move the needle for jeb bush, who has been faltering in the polls. the fact is that even the data we've seen, for instance in that new iowa poll, shows that trump's supporters really seem to like him not so much for what he says but for who he is and for how he is, a successful businessman, a tough talker, not so much for his specific policies. 65% of his supporters say they trust him to figure things out when and if he gets to the white house. they don't need specifics from him. so that's going to be the big question when we see bush trying to attack here, how effective will it be. carol? >> athena jones reporting live for us. despite taking aim at jeb bush and other republican rivals, donald trump tells cnn his focus is on his campaign. >> i just want to talk about my accomplishments. i'm not looking to attack anybody.