the wall has been estimated to cost about $6 million a mile. and if you built the whole thing, you're talking about billions of dollars of taxpayer money that president trump says mexico will eventually pay back. there's not much chance that mexico could afford that, let alone that they would be willing to do it. it could be a really expensive proposition for the united states if you built the whole thing. if the point is just to build a little bit so you can say i built my wall, he can probably do that. >> jeffrey, what would supporters of the wall be satisfied with? >> well, the wall would have to be as good as it could be and would have to work. that's the point. this is a very practical person. she a builder by profession. that's what he does. >> i'm talking about his supporters though, the supporters that want him to build that, what would they be satisfied with? would they be satisfied with a