A former director of the CIA under President George W. Bush writes that Fox News host Sean Hannity is a “true propagandist.”

Michael Hayden, who led the CIA under Bush from 2006 to 2009, told Brookings Institution senior fellow Benjamin Wittes in an email sent over the weekend that “Hannity has entered the pantheon of a true propagandist."

“And his behavior reminds me of a conversation I had with a political office in the mid-1980s when I was an air attaché to Bulgaria,” he continued.

“I asked this officer what truth was to him,” Hayden said. “He responded without hesitation, ‘Truth is what serves the party.’ And there you have it.”

Hayden was responding to a Hannity tweet on Friday praising WikiLeaks under the hashtag #freejulianassange and #freeinternet.

In 10 yrs @wikileaks has gotten nothing wrong & no one's been killed bc of the info released. #freejulianassange #freeinternet for all. — Sean Hannity (@seanhannity) October 21, 2016

In addition to Hannity, Hayden also attacked Fox News in its coverage of the current president and the Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE.

“FOX News has almost entirely jumped the shark,” Hayden told Wittles, who tweeted the email out Sunday evening. “They have given up any semblance of conservatism and focused on an almost visceral hatred of all things Clinton and Obama.”

Hayden did note a few exceptions to his perspective on the network.

“There are a few points of light and Chris Wallace, Bret Baier and Meghan (sic) Kelly,” he wrote.

Hayden is a four-star general who has served in high-ranking positions in the Clinton, Bush and Obama administrations. He has said he will not endorse either Clinton or Republican nominee Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE for president.

Wittles also offered to debate Hannity on WikiLeaks and Russia's possible involvement with the group.

I challenge @seanhannity to have me on his show to debate his endorsement of @wikileaks and discuss whether he is now a Putin pawn. @FoxNews — Benjamin Wittes (@benjaminwittes) October 22, 2016

Wittles is also editor-in-chief of the blog Lawfare.