Hillary Clinton's new memoir will blame her 2016 presidential election loss on Russian interference and former FBI Director James Comey's announcement that he was reopening the investigation into her emails.

Sources familiar with the memoir told the Hill that Clinton made the two scenarios cornerstones of her book, which will be released in September.

"She really believes that's why she lost," said a longtime Clinton ally. "She wants the whole story out there from her own perspective. I think a lot of people are going to be really surprised by how much she reveals."

"She believes she would have won and that Russia and Comey ultimately brought her down. She feels validated by all the news circulating out there about Russia," an adviser said.

The Hill reports that Clinton's book will also examine the role sexism and misogyny played in her election defeat. The former first lady has irritated fellow Democrats by blaming her historic loss on several outside forces, including the Democratic National Committee.

Some Democrats are worried that their party's goal of rebuilding and rebranding itself will be undermined by Clinton's book.

Senate Minority Leader Charles Schumer (D., N.Y.) has publicly stated that Clinton should not blame anyone but herself and lack of messaging.

"When you lose to somebody who has 40 percent popularity, you don’t blame other things—Comey, Russia—you blame yourself," Schumer told the Washington Post. "So what did we do wrong? People didn't know what we stood for, just that we were against Trump. And still believe that."

Former Vice President Joe Biden has also criticized Clinton for her campaign.

"I never thought she was a great candidate. I thought I was a great candidate," he said in May.

"What happened was that this was the first campaign that I can recall where my party did not talk about what it always stood for—and that was how to maintain a burgeoning middle class," Biden said in March.

"You didn't hear a single solitary sentence in the last campaign about the guy working on the assembly line making $60,000 a year and a wife making $32,000 as a hostess," he said.

Other than writing her book, Clinton has been spending her time launching Onward Together, a super PAC with the intention of getting Democratic candidates elected in 2018.