Former Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE apologized to former President Obama after her election loss, according to a new book.

The Hill's Amie Parnes and Sidewire's Jonathan Allen write in "Shattered: Inside Hillary Clinton's Doomed Campaign" that Clinton spoke with the former president, who urged her to concede, after she called Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE on the night of the election to congratulate him on his victory.

On that phone call, Clinton told Trump she would be "supportive of the country's success."

"And that means your success as president," she said.

ADVERTISEMENT

Shortly after, Clinton's aide Huma Abedin approached Clinton and told her Obama was on the phone.

"It's the president," Abedin said.

When Clinton received the call, she realized she had let down the president, herself, her party and the country.

"Mr. President," she said on the phone. "I'm sorry."