Are Iowa voters having a summer romance with Sanders, Trump?

Aired: 8/17/2015 | 0:06:31 | Clip
This year at the Iowa Fair, there was the usual celebration of corn, butter and pork, and then there were the tell-tale signs of an election year: the governors and senators, the legacy candidates, the outliers and the upstarts. Gwen Ifill reports on how Iowa voters are responding to the candidates.