pennsylvania a second look. that's going to be an interesting part of the campaign for the next 48 hours, thomas. >> as we point out, iowans aren't discounting the fact that they have this much time left to make a decision. with the two days to go, the poll finds that many iowans could be convinced to support another candidate. how do you explain that? >> you know, there's an undercurrent here in iowa. not only do iowans take their role incredibly seriously in determining the next president and the kib the tires and look at platforms and understand the visions, but this career in particular, there's an junt current that you have a vulnerable president in the white house. the most vulnerable since jimmy carter in 1980. the republicans we've talked to and we've talked to a lot of them in the last year, are taking their time. they look closely at herman cain, they looked at speaker gingrich. they're spending more time on santorum. they want to get it right. they take their role seriously. but they want to make their vote