Tim Dixon, co-author of a new study called "The Hidden Tribes of America," talks with Brian Stelter about the causes of political polarization in America, including cable news and social media screaming matches. His group, More in Common, says two thirds of Americans are in the "exhausted majority," wanting no part of the left and right's fight. He talks about media business models that worsen polarization and suggests more nuanced ways for the press to showcase political debates.To learn more about how CNN protects listener privacy, visit cnn.com/privacy Learn more about your ad choices. Visit podcastchoices.com/adchoices