Why is there no GOP establishment frontrunner?

Aired: 10/26/2015 | 0:08:33 | Clip
As Donald Trump ramp ups rhetoric against Ben Carson, Jeb Bush seems to be scaling down his campaign. Meanwhile, the Democratic field is down to three candidates. Gwen Ifill speaks to Amy Walter of the Cook Political Report and Tamara Keith of NPR about the current campaign landscape and Joe Biden’s decision not to run.