Former Secretary of State Hillary Rodham Clinton speaks to the National Automobile Dealers Association meeting in New Orleans today. (AP Photo/Gerald Herbert)

Hillary Clinton called the Benghazi terror attack the “biggest regret” of her tenure as secretary of State on Monday, a message she's expected to emphasize, as she ponders a 2016 White House run. “My biggest, you know, regret is what happened in Benghazi,” Clinton said when asked to identify “do-overs” of her time as America's top diplomat, during her keynote appearance before the National Automobile Dealers Association in New Orleans/The Hill. More here.

Question: How badly does the Benghazi terror attack hurt Hillary Clinton's 2016 presidential chances?