Live from the Democratic National Convention in Philadelphia, the Morning Joe panel speaks with Philadelphia Mayor Jim Kenney about the city’s relationship between its police and the public. Veteran columnist Mike Barnicle says: “The biggest disruption between citizens and police is the tidal wave of guns that arrive in cities.” Kenney talks about his city’s challenges when it comes to gun violence. “We have carnage here.” Hear the rest of the conversation on MSNBC.