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From left, Democratic presidential candidates Bernie Sanders, Hillary Clinton and Martin O'Malley prepare to debate at Drake University in Des Moines, Iowa, on Saturday, November 14. It was the party's second presidential debate. Alex Wong/Getty Images
The debate took place in the Sheslow Auditorium of Drake University. MANDEL NGAN/AFP/AFP/Getty Images
Sanders talks to the audience during a commercial break. Charlie Neibergall/AP
The candidates gesture during the debate. Charlie Neibergall/AP
Drake University students watch the debate. Nati Harnik/AP
O'Malley give the thumbs up after the debate. MANDEL NGAN/AFP/Getty Images
Clinton waves to supporters following the debate. MANDEL NGAN/AFP/Getty Images
CBS "Face the Nation" anchor John Dickerson moderates the debate. Alex Wong/Getty Images North America/Getty Images
The candidates take the stage. Nati Harnik/AP
