Businessman and former radio talk show host Herman Cain pulled off an upset Saturday. He came in first in the Florida straw poll, handily beating both Texas Gov. Rick Perry and former Massachusetts Gov. Mitt Romney. It's a big victory for a candidate who, up to now, has drawn little media attention and placed fifth or sixth in many national polls. Host Audie Cornish talks with NPR's Greg Allen about whether this marks a change in the Republican presidential nominating contest.