56% of them say their front-runner could be changed. so i don't know. it's really tough to diagnose iowa voters. and what's working and what's changing the needle there. if i were ted cruz, i would continue to laugh this off. i would just take the high road on this. i don't think iowa voters in particular are scared of cruz's sort of otherness. >> but i got to tell you, in your newspaper, "the washington post," david, had a major article today by a legal scholar at the university of delaware law school who says she doesn't like much of what trump says, but on this issue whether ted cruz is a natural born citizen she makes the legal case he is not and as a result not qualified, not eligible to be president of the united states. i assume you read that article. >> yeah, a lot of people are talking about that piece. mary mcmahon wrote it she's a legal scholar. she makes this argument point by point about the fact that cruz is not eligible. i have talked to some top legal