Sen. Rand Paul (R-Ky.) had harsh words for former CIA director John Brennan after Brennan accused President Donald Trump of treason after meeting with Vladimir Putin Monday.

Brennan criticized the president for not being more forceful with the Russian leader and for not backing up U.S. intelligence findings of Russian interference in the 2016 presidential election.

“Donald Trump’s press conference performance in Helsinki rises to & exceeds the threshold of ‘high crimes & misdemeanors.’ It was nothing short of treasonous,” Brennan tweeted.

Donald Trump’s press conference performance in Helsinki rises to & exceeds the threshold of “high crimes & misdemeanors.” It was nothing short of treasonous. Not only were Trump’s comments imbecilic, he is wholly in the pocket of Putin. Republican Patriots: Where are you??? — John O. Brennan (@JohnBrennan) July 16, 2018

Senator Paul was asked about the comments in a Fox News hit Monday morning, and he didn’t hold back, broadsiding Brennan for being a “bigot” and voting for a communist for president.

“John Brennan started out his adulthood by voting for the communist party presidential candidate and showing himself to be the most bias, bigoted, hyperbolic unhinged director of the C.I.A. that we’ve ever had,” Paul stated.

Brennan admitted to voting for the Communist Party’s presidential candidate while in college.

“He called the president treasonous because he doesn’t like him,” Paul continued. “Brennan and [James Clapper] are known for wanting to expand the authority of the intelligence agencies to grab up everyone’s information including Americans and so I don’t have a lot of respect for these people before they decided to go on hating the president.”

“I dislike these people because they wanted to grab up so much power and use it against the American people,” Rand concluded. “Some people are deranged with Trump and that’s why they’re crazy.”

WATCH: