Former CIA Director John Brennan John Owen BrennanJournalism or partisanship? The media's mistakes of 2016 continue in 2020 Comey on Clinton tweet: 'I regret only being involved in the 2016 election' Ex-CIA Director Brennan questioned for 8 hours in Durham review of Russia probe MORE on Monday blasted President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's claims that he can pardon himself and that the special counsel is unconstitutional, saying that "his tweets are not the tweets of an innocent individual."

Speaking on "MSNBC Live with Hallie Jackson," Brennan said the Department of Justice had the right to call for a special counsel to investigate Russian meddling in the 2016 presidential election, something he termed "an egregious assault upon our democratic foundations" and "electoral process."

He added that Trump's tweets show just how worried the president is about what special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE and his team are uncovering.

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"And his tweets are not the tweets of an innocent individual. So I think it really demonstrates just how desperate he is getting, grasping at straws, and Rudy Giuliani as well," he added, referring to the president's lawyer.

"Neither Rudy nor his boss feel encumbered by facts, truth or common sense and so I think that's why they're throwing these things out now to try to get whatever traction among their base as possible."

In a tweet early Monday morning, Trump claimed that he has the "absolute right" to pardon himself but that he wouldn't because he hasn't committed a crime. He followed that up by tweeting that the special counsel investigation is "unconstitutional."

As has been stated by numerous legal scholars, I have the absolute right to PARDON myself, but why would I do that when I have done nothing wrong? In the meantime, the never ending Witch Hunt, led by 13 very Angry and Conflicted Democrats (& others) continues into the mid-terms! — Donald J. Trump (@realDonaldTrump) June 4, 2018

The appointment of the Special Counsel is totally UNCONSTITUTIONAL! Despite that, we play the game because I, unlike the Democrats, have done nothing wrong! — Donald J. Trump (@realDonaldTrump) June 4, 2018

Brennan has continually ripped Trump during his presidency. In an op-ed published in The Washington Post on Friday, he compared the president to “corrupt, incompetent … demagogues.”

Trump responded on Saturday by quoting conservative commentator and former Secret Service agent Dan Bongino, who on "Fox & Friends" this weekend said that no "single figure in American history has done more to discredit the intelligence community than" Brennan.

Some commentators have accused Brennan of selective outrage. But Brennan pushed back against those views on Monday, stating that he's not partisan and only speaks out because of Trump's actions.

"I am not going to hesitate when I think that the president of the United States takes full advantage of his Oval Office perch to tell the American people lies and also to try to protect himself and those around him who may, in fact, be liable to some type of actions on the part of the Department of Justice," Brennan said.