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The one thing you need to know to understand Clinton’s chances

This is the one thing you need to know to understand how Hillary is polling — and what her chances are for winning the presidency in 2016.

Democratic presidential candidate Hillary Rodham Clinton listens to a question from the audience during a campaign stop at Trident Technical College, June 17, 2015, in North Charleston, S.C. (Photo by David Goldman/AP)
Democratic presidential candidate Hillary Rodham Clinton listens to a question from the audience during a campaign stop at Trident Technical College, June 17, 2015, in North Charleston, S.C.AP

Chuck Todd

Chuck Todd is NBC News' chief political analyst and the former moderator of "Meet The Press."

Mark Murray