5 takeaways from new book about Hillary Clinton's failed campaign

The book contains some juicy behind-the-scenes details from the 2016 race.

The book, "Shattered: Inside Hillary Clinton's Doomed Campaign," was released on Tuesday. It was written by two political journalists, Jonathan Allen, a former Politico White House bureau chief who is currently the head of content at political news site Sidewire, and Amie Parnes, the senior White House correspondent for The Hill.

The two said they spent a year and a half conducting interviews with more than 100 sources. Through these interviews, they said, they developed a sense that the goings-on in Clinton's world were "starkly at odds with the narrative the campaign and the media were portraying publicly."

Here are five of the biggest takeaways from the book.

Unease over email issues

Early on, the authors tackle one of Clinton's biggest headaches: the email saga that plagued her campaign. "Shattered" details her alleged snooping through her aides' email accounts after her failed 2008 campaign.

She allegedly looked through the campaign server "to see who was talking to who, who was leaking to who."

On March 10, 2015, she made her first statement on the issue, saying at a press conference that she didn't send or receive emails containing classified information over the private server — which was later proved false. After the event, she allegedly told her aides that she thought she had nailed it.

The months that followed showed that was far from the case, however. At one point, Bill and Hillary Clinton arranged a conference call with top aides in which the couple criticized the staff's handling of the scandal, Allen and Parnes write. As one person on the call bluntly puts it, "We got an ass-chewing."

It wasn't until Clinton was interviewed by ABC News' David Muir in early September that she expressed contrition for deciding to use a private email server, the authors write.

A missed warning

The book alleges that as Donald Trump took the lead among Republican primary contenders, her campaign received a warning from an unnamed longtime Clinton adviser that laid bare what could happen.

The warning came in the form of a memo with a straightforward title, "Fact: Donald Trump can defeat Hillary Clinton and become the 45th president of the United States."

In terms of numbers, the adviser suggested that the Clinton team account for that unknown factor by adding "3 or 4 points to whatever [polls] say about his support."

Flashbacks to a fumble by Bill Clinton

The new book alleges that aides saw Bill Clinton make a similar mistake on the 2016 trail.

The book alleges that Bill Clinton "believed he was in the right and that he was helping his wife. No one else did."

It goes on to say that his aides "lit into him," calling the incident "his worst foul-up of the campaign."

Tensions at the VP rollout

Kaine received a congratulatory call from then-President Obama shortly after Clinton formally asked him to fill the role and Kaine agreed. When it came to the public introduction, however, things were far less cheery behind the scenes.

"Hillary genuinely likes Debbie. I think she's the only one in the orbit who does," a Democratic source told the authors. "The campaign does not like Debbie."

Wasserman Schultz was reportedly upset over her diminished role in the event and spoke about it afterward in a meeting with Clinton campaign chairman John Podesta. After that meeting, he reportedly made his feelings about Wasserman Schultz clear.

"If she's ever speaker of the House, I'm done with politics," Podesta told his colleagues, according to the book.

Issuing congratulations – and an apology

The book delves into how Clinton conceded on election night, reporting that there was some unintended delay in her making the call to Trump. Campaign manager Robby Mook was reportedly unable to reach Trump's campaign manager, Kellyanne Conway. The authors write that Conway picked up her phone only when Clinton's close aide Huma Abedin called.

It was then that Conway gave her phone to Trump and Abedin gave hers to Clinton. "Congratulations, Donald," Clinton said. "I'll be supportive of the country's success, and that means your success as president."

Shortly after her call with Trump, Abedin handed Clinton the phone again. But this time, it was Obama on the line.

"Mr. President, I'm sorry," Clinton reportedly told him, feeling that she had let him down.