Homeland Security Secretary Janet Napolitano, buzzed about as a potential 2016 presidential candidate if Hillary Clinton doesn't run, did not rule out an eventual bid when asked about it Tuesday. The former long-serving Arizona governor instead brushed off the question, joking that she's too busy keeping U.S. borders safe to consider a race. At a breakfast interview hosted by the Christian Science Monitor, she said, "my plate is so full now that that kind of contemplation would be the kind of thing that would keep me up at night, and I lose enough sleep as it is." (surely Sarcasm)