Former Secretary of State Hillary Clinton remains the 2016 presidential candidate to beat, but her handling of the Benghazi, Libya assassination of the U.S. ambassador, panned by the public, has significantly knocked her approval ratings down from an all-time high of just three months ago, according to a new poll.

While her favorability rating in February was 61 percent, a new Quinnipiac University poll out Friday had it cobbled down to 52 percent and her once double-digit lead over potential GOP presidential challengers Jeb Bush and Sen. Rand Paul has been cut to less than 10 percent.