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 called President 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 “selfish” after the president tore into former Senate Majority Leader Harry Reid Harry Mason ReidThe Supreme Court vacancy — yet another congressional food fight Trump seeks to turn around campaign with Supreme Court fight On The Trail: Battle over Ginsburg replacement threatens to break Senate MORE (D-Nev.).

Brennan, a frequent critic of Trump, took issue with the president's tweet accusing Reid of trying to “put a good spin on his failed career.”

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“You shame yourself & the Office of the Presidency every time you try to smear those who dedicate their lives to public service,” Brennan tweeted. “These elected officials, like so many others, have worked selflessly on behalf of their fellow citizens, something unfamiliar to one as selfish as you.”

You shame yourself & the Office of the Presidency every time you try to smear those who dedicate their lives to public service. These elected officials, like so many others, have worked selflessly on behalf of their fellow citizens, something unfamiliar to one as selfish as you. https://t.co/zqAIofpjSc — John O. Brennan (@JohnBrennan) February 25, 2019

Trump claimed in a tweet earlier Monday that Reid “got thrown out” of Congress, but Senate Democrats' longtime leader did not seek reelection in 2016 after 30 years in the upper chamber.

“Former Senator Harry Reid (he got thrown out) is working hard to put a good spin on his failed career,” Trump wrote in a tweet. “He led through lies and deception, only to be replaced by another beauty, Cryin’ Chuck Schumer Chuck SchumerSenate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' Jacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee MORE. Some things just never change!”

Those comments seemingly came in response to Reid’s harsh criticism of Trump in an interview with CNN that was published Monday.

In that interview, Reid said he would welcome the return of former President George W. Bush and said he does not have anything positive to say about Trump.

"I just have trouble accepting him as a person, so, frankly, I don't see anything he's doing right," Reid said.

Brennan, one of Trump’s harshest critics in the national security world, had his security clearance revoked by the president last year in what was widely seen as retaliation for his critical comments of the president.