Hillary Clinton's decision to use a private email server while she was secretary of state set off one of her closest advisers.

In newly-released emails from WikiLeaks, Neera Tanden, co-chair of Clinton's transition team, fumes at John Podesta, Clinton's campaign chair, over who could have approved her using the private system.

Tanden said whomever gave the OK should be "drawn and quartered," calling the whole situation "f***ing insane" in a July 2015 message.

In previous messages released by WikiLeaks, Tanden and Podesta seemed to place the blame on Clinton's top State Department aide and attorney Cheryl Mills.

"This is a cheryl special," Tanden wrote. "Know you love her, but this stuff is like her Achilles [heel]. Or kryptonite. she just can’t say no to this [s***]. Why didn’t they get this stuff out like 18 months ago? So crazy," Tanden said.

Podesta agreed that the refusal disclose it earlier was "unbelievable."

"[I] guess I know the answer," Tanden replied. "[T]hey wanted to get away with it."

Hillary Clinton has declined to address what has been exposed by the hacked emails, blaming the Russians for using WikiLeaks to influence the outcome of the election.

Watch the Outnumbered report and discussion above.

Judge Jeanine: An 'Octopus of Connections' Between Media and Clintons

Clinton Aide: 'There Is No Good Answer' to Private Email Server Questions

'It's Very Rude': Trump Hits Back at Questions Over D.C. Hotel Appearance