One of Hillary Clinton's top advisers was aghast at her private email server problems, the newest Wikileaked emails show.

Talking to John Podesta, Clinton's campaign chairman whose emails were hacked, Center for American Progress president Neera Tanden used strong language in late July of 2015 to discuss the ongoing scandal.

Do we actually know who told Hillary she could use a private email?' she asks in a late night email on July 25. 'And has that person been drawn and quartered?'

'Like whole thing is f***ing insane,' she remarked.

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The Center for American Progress' Neera Tanden called Hillary Clinton's private email server 'f***ing insane' and wondered if the person who advised it was 'drawn and quartered'

The Wikileaks release of Hillary Clinton campaign chairman John Podesta's emails shows top advisers complaining about Clinton's 'terrible' instincts and decisions

She and Podesta were discussing the email scandal and also Sen. Bernie Sanders' rise in the poll as Clinton, who had once been considered an easy shoe-in for the nomination, became exposed.

Tanden told Podesta, who headed CAP before rejoining Clinton world and becoming part of the campaign, that she was supposed to go on CNN and talk to Jake Tapper about the newest set of polls.

'They wouldn't tell me results but if I had to guess it - discerning from our prep call -will show Bernie doing pretty well w Hillary and doing as well against Jeb or close to it,' Tanden thought.

Podesta responded with a burn for Sanders.

'PS can you imagine what the Republicans would do to him if he were the nominee?' Podesta wrote.

Answering that email about an hour and a half later, Tanden suggested Podesta not jump to conclusions right yet.

'Well, let's see what the poll actually says,' she said at 7:15 p.m. 'Let's hope the Democratic party is not suicidal.'

Then, a little after midnight, she wrote Podesta back, calling the whole email scandal 'f***ing insane.'

Two of Hillary Clinton's top advisers - John Podesta (left) and Neera Tanden (center) were caught griping about their Democratic candidate

Leaked conversations between Podesta and Tanden have already shed light on how irked even some of Clinton's closest allies were with the news of her secret server and the damage it created for her politically.

A similar back-and-forth, dated September 6, 2015, came at a point in the campaign when many in Democratic circles expected Vice President Joe Biden to jump into the race.

Podesta and Tanden both used the adjective 'terrible' to describe Clinton's instincts and decisions.

'How are you feeling about things?' Tanden asked Podesta.

The campaign chairman, who started the Center for American Progress after leaving the Clinton White House, replied, 'Biden will get in.'

'We are still way more likely than not to win nomination,' Podesta assured Tanden.

'We've taken on a lot of water that won't be easy to pump out of the boat,' he continued. 'Most of that has to do with terrible decisions made pre-campaign, but a lot has to do with her instincts.'

Podesta noted how Clinton was 'nervous' so she was 'prepping more and performing better.'

'Got to do something to pump up excitement but not certain how to do that,' he added.

Tanden wrote back saying how she was not a 'sycophant' to Podesta 'by any means.'

'But the thing that makes me most confident she will prevail is that you are there,' she said, complimenting the longtime Clinton ally.

'Almost no one knows better me that her instincts can be terrible,' Tanden also acknowledged.

In a previous email exchange, the duo seemed miffed by Clinton's decision to use a private email server while at the State Department, a scandal that ended up plaguing the entirety of the former secretary of state's presidential campaign.

'Speaking of transparency, our friends Kendall, Cheryl and Philippe sure weren't forthcoming about the facts here,' Podests wrote in an email from March 15, the same day the news broke about Clinton's personal email use

Podesta was referring to David Kendall, Clinton's counsel, along with her top State Department aides Cheryl Mills and Philippe Reines.

'Why didn't they get this stuff out like 18 months ago? So Crazy,' Tanden said.

She then answered what she had been pondering.

'I guess I know the answer: They wanted to get away with it,' she said.

Trump happily mentioned Podesta's comments last Wednesday at the final presidential debate in Las Vegas.

John Podesta, shown on Hillary Clinton's campaign plane, pushed back against Trump quoting him in Las Vegas, saying Clinton was the 'best leader for the United States'

'Now, John Podesta said you have terrible instincts. Bernie Sanders said you have bad judgment. I agree with both,' the Republican nominee said, addressing Clinton onstage in Las Vegas, Nevada.

Afterward Podesta argued to DailyMail.com that the frankness in his emails, don't undercut his argument for his chosen candidate.

'No, I think, you know, I love Hillary Clinton and I think if any fair reading of what I've said about her or what I think about her indicates that I think she is someone who's a tremendous leader who's gotten tremendous results for kids, for families, for people throughout her public service,' he said.

'So if Donald Trump wants to quote me, than he should fully quote me that she is the best leader for the United States, she's got a tremendous leadership skills,' Podesta said.