Hillary Clinton: 'I'm Not Even Sure' Bernie Is A Democrat

Hillary Clinton is running against Sen. Bernie Sanders (I-Vt.) for the Democratic nomination for president, but she's not positive he belongs in the race. 

"He's a relatively new Democrat," the former Secretary of State told Politico. "In fact, I’m not even sure he is one. He’s running as one. So I don’t know quite how to characterize him."