How this powerful NRA lobbyist transformed U.S. gun laws

As Florida's legislature begins to consider changes to gun laws in the wake of the deadly shooting at a Parkland high school, the question of whether anything will pass has a great deal to do with the powerful voice of the NRA in that state. Mike Spies, who wrote about the NRA's past successes there for The New Yorker, joins Hari Sreenivasan for more.