PoliticsNation with Al Sharpton 07/13/15

The GOP field swells to 15 with Scott Walker

Scott Walker is officially in, but can he outflank Donald Trump? Rev. Sharpton talks to Kasie Hunt, Ed Rendell, Abby Huntsman and Rep. Gwen Moore on how Walker’s announcement will change the 2016 GOP landscape. ... more Duration: {{video.duration.momentjs}}