The mass shooting in San Bernardino this week has triggered yet another debate over gun control. But that debate has a new twist: a passionate dispute over the power of prayer. After the terrorist attacks in Paris, #PrayForParis started trending on Twitter, and people superimposed the French flag over their photos on Facebook. No one seemed to be debating the merits of prayer. But when a mass shooting hit closer to home, in California, prayer got political. Some Republicans tweeted that their “thoughts and prayers” were with the victims. Meanwhile, some Democrats insisted that the time for praying was over and that only concrete action could prevent the next tragedy. So what’s behind this so-called “prayer shaming?" Emma Green, managing editor for The Atlantic magazine, writes about politics, religion and culture, and joins us to help answer that question.