Hillary: Benghazi was 'biggest regret'

Hillary ClintonHillary Rodham ClintonHouse Dems ask DOJ watchdog to investigate Sessions's role in Comey firing Grassley: Why hasn't acting FBI chief recused himself on Flynn? GOP touts FBI probe into Sanders’s wife MORE 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.

Republicans have hammered Clinton over the death of Ambassador Christopher Stevens and three other Americans in 2012, chipping away at her record on national security. An internal review of the attack faulted the State Department for failing to provide better security at the U.S. consulate but Republicans say Clinton has unfairly escaped blame.

Clinton slammed her critics at a Senate hearing last year – when she famously demanded to know “what difference does it make?” She has since adopted a different tone.

“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.

“It was a terrible tragedy,” she said.

Read more from The Hill.