Hillary Clinton's aides called money donated to her charitable organization her daughter's 'nest egg', a new book claims.

The former Democratic presidential candidate's fundraiser took in $250million for the Clinton Foundation before she announced her White House run.

In her new book, Chasing Hillary: Ten Years, Two Presidential Campaigns and One Intact Glass Ceiling, New York Times journalist Amy Chozick does not say if the nest egg comment from one aide was a joke, though it appears to be a snarky comment referring to the foundation's history of controversy.

The revelation is likely to deepen a feud between Chelsea Clinton and Chozick.

The former first daughter has been using her Twitter account to berate Chozick and accuse her of writing 'fiction'.

In a series of tweets Chelsea first attacked specific parts of the book - that she popped open Veuve Cliquot champagne an hour after polls closed on election night, and that she had keratin treatment to straighten her hair - then stepped up the assault claming the book should not be in the non-fiction section.

'Chelsea's nest egg': A new book reveals what aides to Hilary Clinton called the family's Clinton Foundation - one of whose events all three of them spoke at in March 2014

Twitter storm: Just some of the tweets unleashed by Chelsea Clinton against Amy Chozick, the New York Times journalist whose book reveals how aides called the Clinton Foundation 'Chelsea's nest egg'

Chelsea alleges the book was not fact-checked and attacked MSNBC anchor Katy Tur when she supported Chozick.

The 'nest egg' description will renew scrutiny of the foundation, which is currently being investigated by the FBI over a possible pay-to-play scheme while Clinton was Secretary of State.

The FBI first looked into the organization in 2016 but the investigation did not lead to any charges. Reports in January said that it was reopened and is still ongoing.

It has long faced questions over its relationship to all three Clintons' wider activities.

One explosive email revealed in the Wikileaks publication of Hillary's campaign chief John Podesta said that it had paid for her wedding.

The email, from Doug Band, Bill's closest aide for many years said: 'The investigation into her getting paid for campaigning, using foundation resources for her wedding and life for a decade, taxes on money from her parents.'

CASH FOR CLINTONS: WHAT DONORS' DOLLARS BOUGHT $250,000: Intimate chat with Hillary Clinton at her waterfront rental in The Hamptons where Clinton spends the summers $10,000: Family photo with Hillary Clinton $2,700: Children aged 16 and under got to ask her a question at an event at the estate of hedge fund magnate Adam Sender in Sag Harbor, which is also in The Hamptons Advertisement

No Clintons passed any personal comment on it for more than a year - although spokespeople denied it - until January when Bill used twitter to deny that funds raised to help Haiti after an earthquake there had been raided to pay for Chelsea's lavish wedding to Marc Mezvinsky, with whom she now has two children.

The charity, whose full name is the Bill, Hillary & Chelsea Clinton Foundation, has Bill and Chelsea on its board and says that neither are paid a salary or expenses.

But critics have focused on how it is part of a political machine.

Chozick's book dissects Clinton's campaign fundraising machine with fresh and startling detail.

The book says that the whole operation was overseen by Dennis Cheng, a London School of Economics graduate who wore pocket squares and Paul Smith socks and became Clinton's campaign finance director.

Such was his sway over wealthy donors that he had already amassed $250 million to the Clinton Foundation before her Presidential campaign began and he went to work for it.

Chozick says that Cheng was known as a 'master concierge' and he offered a 'full menu' for those willing to pay for access to Clinton who used the cash to campaign.

For $250,000 you got an intimate chat with her at her waterfront house in The Hamptons on Long Island, New York, where Clinton spends the summers.

For $2,700 children aged 16 and under got to ask her a question at an event at the estate of hedge fund magnate Adam Sender in Sag Harbor, which is also in The Hamptons.

Denial: How Bill Clinton addressed a bombshell leaked email in a direct denial that his family foundation paid for the lavish wedding of his daughter to Marc Mezvinsky

Key men: David Cheng oversaw the vast Clinton fundraising operation for her campaign after doing the same for the foundation. But Doug Band, Bill Clinton's longtime aide, claimed in a leaked email that Chelsea was 'getting paid for campaigning, using foundation resources for her wedding and life for a decade, taxes on money from her parents'

At one event an eight-year-old boy asked: 'I go to Dalton (an exclusive private school) but how would you make sure every kid gets to go to a good school?'

For those who wanted a family photo with Clinton, it cost them another $10,000.

Chozick contrasts Clinton's old fashioned fundraising approach with that of Bernie Sanders, her Democratic presidential rival, who had a skeleton staff but still raked in $230 million through small online donations of $5 to $10.

Clinton by contrast exhausted herself by dropping off the campaign trail to fly across the country 'and hit up a living room full of rich people for $2,700 checks'.

Chozick writes that her writing stories about the Clinton doing paid speeches after she left office as Secretary of State infuriated the Clintons.

She then turned her attention to the Clinton Foundation, and one of her stories early on caused such consternation that one source likened it to 'punching the biggest baddest mother f***** in the prison yard in the face on my first day of a four year sentence'.

The source joked: 'At least they know who you are now'.

Chozick replied: 'So they could shiv me in the shower.'

Among the controversies Chozick wrote about was the Clinton Foundation buying a first class ticket for Natalie Portman and her yorkie dog to fly to a Clinton Global Initiative event.

She also covered the gray area between the State Department when Clinton was Secretary of State and donors to the Clinton Foundation.

They included Ukrainian oligarch Victor Pinchuk who, bizarrely, liked the story and invited Chozick to his annual conference in Yalta on the Black Sea.

Chozick's Chasing Hillary: Ten Years, Two Presidential Campaigns, and One Intact Glass Ceiling, was released on Tuesday

Clinton has also faced criticism for her speeches to Wall St; she and her husband Bill made up to $76,000 a day fueled by large payments from Wall St banks that date back to at least 1999.

The vast sum was driven by speech fees and from 2001 onward the Clintons earned $7.7 million for at least 39 appearances for likes of UBS and Goldman Sachs - the equivalent of $210,000 a time.

Clinton also gave speeches to unlikely organizations who paid her more than $200,000 for speaking including the American Camping Association and the American Society of Travel Agents.

A spokesman for the Clinton Foundation said: 'We haven't read the book, but like other charitable foundations, the Clinton Foundation's endowment serves to ensure that its life changing work continues.'

Chasing Hillary: Ten Years, Two Presidential Campaigns and One Intact Glass Ceiling by Amy Chozick is available on Amazon.