Harvard professor Cass Sunstein returns to discuss his new book #Republic, which looks at polarization in the digital age. While America isn't more polarized than ever, Sunstein says it's important to focus on how today's problems are different and new. "You find yourself in a cocoon, even if you didn't choose it," says Sunstein. But he sees hope in sites that are actively trying to sell their readers on content from outside their normal media diet. "In the fullness of time, the non–echo chamber model is going to be producing a lot of revenue."

No Spiel today, due to technical difficulties. Mike explains in the top of the show.

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