Washington D.C., [U.S.], Nov. 13 : Speaking out on her stunning loss to Donald Trump in the race to the White House, Hillary Clinton asserted that FBI Director James Comey had delivered a double whammy to her candidacy in the final days of the campaign by taking another look at emails related to Clinton's private server before abruptly saying he found no wrongdoing.

A member of her national finance committee who was on the call told CNN that Clinton placed at least some of the blame on Comey for her stunning defeat to Donald Trump.

She said the first letter from Comey, sent to Congress on October 28, stopped the momentum she had built after three debates and the release of Trump's "Access Hollywood" tape.

However, several Democrats interviewed in the aftermath of the election say Clinton is hardly blameless, pointing to her original decision in 2009 to create a private email server outside of government systems during her time as secretary of state.

"If there had been no private server in the first place there would not have been an FBI investigation," Jim Manley, a longtime Democratic strategist, wrote in a Twitter message on Saturday.

On the call, Clinton urged supporters to move forward and keep fighting for their beliefs.

The conversation, which lasted about 30 minutes, was not open to the press. Another Democrat on the call said Clinton described the loss as "heartbreaking."

Earlier in her concession speech, Clinton told supporters that she was sorry for not being able to defeat Trump. (ANI)