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Stuart Varney said Donna Brazile's bombshell allegation that the DNC rigged the Democratic primary to ensure that Hillary Clinton won the nomination over Bernie Sanders is damaging to both the Democratic Party and Clinton's political future.

In her new book, Brazile, former interim Democratic National Committee chair, claims that the DNC was in debt and signed a secret agreement with the Clinton campaign to keep the party financially afloat. She said that effectively turned the party’s financial, strategy and staffing decisions over to the Clinton team, rigging the nomination process.

"The book comes out tomorrow, but the damage has been done already," Varney said.

He explained that the progressive, Sanders-supporting wing of the Democratic Party is "hopping mad" that the nomination process was rigged.

"The battle within the Democrat Party has turned brutal," Varney said. "It is a total split."

He added that this also means that Hillary Clinton is involved in a third major scandal, along with the Uranium One deal and the infamous Trump dossier.

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Varney speculated that Brazile spoke out about the rigged primary to sell more books or because she's sick of Clinton and the Democrats coming up with excuses for their 2016 loss.

"Either way, the Clintons are done in politics. And the Democrats are going to struggle to unify behind a winning message and a winning candidate, if they can find one."

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