AM Joy S2016E04 - 5/21/16

The bitter divide between supporters of Hillary Clinton and Bernie Sanders has some Democrats worried about the convention in Philadelphia and whether it will be a throwback to the contentious contests of the past. MSNBC'S Joy Reid reports.

National Press Secretary for Hillary Clinton's campaign, Brian Fallon, discusses Bernie Sanders' claim that Clinton will only win because of super delegates. He also comments on Clinton's campaign in 2008 against Barack Obama.