The Presidential hopeful said "Mr President, I'm sorry" in a private phone call to Mr Obama shortly after conceding the election, according to a new tell all book.
She then called Mr Trump to congratulate him and declare her support “of the country’s success and that means your success”.
It has been revealed that Mr Obama told Mrs Clinton to concede in order to protect the public's confidence in an electoral system that her opponent had sought to undermine.
The new book revealed Clinton's reaction to the Presidential loss
Hillary winces. She wasn’t ready for this conversation
The book, titled 'Shattered' and written by political journalists Jonathan Allen and Amie Parne, states: “Hillary winces. She wasn’t ready for this conversation. When she’d spoken with Obama just a little bit earlier the outcome of the election wasn’t final yet.
“Now, though, with the President placing a consolation call, the reality and dimensions of her defeat hit her all at once.
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“She had let him down. She had let herself down. She had let her party down. And she had let her country down.
“Obama’s legacy and her dreams of the Presidency lay shattered at Donald Trump’s feet. This was on her. Reluctantly she rose from her seat and took the phone.
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“Mr President, she said softly. I’m sorry.”
Bill Clinton reportedly sensed that his wife and her campaign team were not grasping the danger that Trump posed.
It is reported that Obama told Clinton to concede
The authors contend that Bill felt that Brexit showed there was a “strong contempt for existing power structures that reflected the mood of the American electorate”.
In an excerpt in the Mail, the book says: “Bill had a better feel for the working stiff, whether American or British, than anyone in Hillary’s orbit.
Bill is revealed as having warned the Clinton election team about the publics demands
“He knew that and he felt like he was being heard. But he couldn’t figure out why Hillary and her team weren’t executing.”
“Shattered: Inside Hillary Clinton’s Doomed Election Campaign”, is by Jonathan Allen and Amie Parnes and is published by Crown.
The authors recount the hour by hour drama of how confidence was crushed and replaced with devastation as Trump won in a huge political upset.