Venting his emotions on Twitter, John Brennan stated that Trump’s "hypocrisy knows no bounds" and that despite what the president said earlier, "Jim Clapper is a man of integrity, honesty, ethics, & morality."
The former CIA chief also claimed that Trump’s actions "diminish the Office of the Presidency" itself.
Brennan’s criticism came in response to an earlier Trump tweet in which the president labeled Clapper a “lying machine who now works for Fake News CNN.”
Earlier, on April 27, the US House Intelligence committee revealed its final report, sharing its findings regarding alleged Russian meddling in the vote and accusations of collusion between Moscow and President Donald Trump's campaign team.
READ MORE: House Intel Panel Finds No Collusion Between Trump Campaign and Kremlin
According to the document, entitled "Report on Russian Active Measure," the panel concluded that there was no collusion between the sitting president's election campaign and Russia.
The committee has also concluded that "former Director of National Intelligence James Clapper, now a CNN national security analyst, provided inconsistent testimony to the Committee about his contacts with the media, including CNN."
James Clapper, who served as the Director of National Intelligence during the Obama administration and resigned from the office in 2016 at the end of Obama’s term, is among the most vocal critics of Donald Trump.