Pew is out with an extensive look at nine different ideological groups latent in America's political divides. And the National Rifle Association struggled with how to respond to the 1999 mass shooting at Columbine High School, but its eventual course of action reveals a lot about the group's behavior in the subsequent two decades.This episode: White House correspondent Scott Detrow, acting congressional correspondent Deirdre Walsh, senior political editor and correspondent Domenico Montanaro, and Washington investigations correspondent Tim Mak.Connect:Subscribe to the NPR Politics Podcast here.Email the show at nprpolitics@npr.orgJoin the NPR Politics Podcast Facebook Group.Listen to our playlist The NPR Politics Daily Workout.Subscribe to the NPR Politics Newsletter.Find and support your local public radio station.