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, a staff writer for The Trace who wrote about the NRA's past successes for The New Yorker, joins Hari Sreenivasan for more.