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 told MSNBC's "Morning Joe" on Wednesday that President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE has shown a "lack of integrity" in office.

In an interview, the former Obama-era CIA chief explained his tweets attacking Trump following the firing of Deputy FBI Director Andrew McCabe Andrew George McCabeGraham: Comey to testify about FBI's Russia probe, Mueller declined invitation Barr criticizes DOJ in speech declaring all agency power 'is invested in the attorney general' GOP votes to authorize subpoenas, depositions in Obama-era probe MORE, whom Brennan defended.

ADVERTISEMENT

"The president has shown a lack of understanding of international affairs, as well as a real ignorance about what it takes to be president of the United States," Brennan said.

"He is mean-spirited, he is dishonest, he has shown a lack of integrity, and he has continued to, I think, demean the office of the presidency," Brennan added.

Brennan's comments follow a tweet from the former CIA director accusing the president of turning McCabe into a "scapegoat" for problems at the FBI. McCabe said last week that he was fired over his proximity to former FBI Director James Comey James Brien ComeyDemocrats fear Russia interference could spoil bid to retake Senate Book: FBI sex crimes investigator helped trigger October 2016 public probe of Clinton emails Trump jabs at FBI director over testimony on Russia, antifa MORE, who was fired last year.

"When the full extent of your venality, moral turpitude, and political corruption becomes known, you will take your rightful place as a disgraced demagogue in the dustbin of history. You may scapegoat Andy McCabe, but you will not destroy America ... America will triumph over you," Brennan tweeted in response to Trump.

His comments referring to Trump's "lack of understanding of international affairs" appeared to be a reference to Trump's recent announcement of tariffs on steel and aluminum imports, which were widely panned by Washington Republicans and free trade advocates.

Brennan condemned the tariff plan in a tweet earlier in March.

"You show an amazing albeit unsurprising ignorance of how technology, automation, and the attendant evolution of economics and societies have transformed the world. Your simple minded policies--imposition of tariffs--have the potential to seriously damage our future prosperity," Brennan wrote.

Brennan is a frequent critic of the president, and in February tweeted that the president was being "petty" by attacking law enforcement over the ongoing Russia investigation.

"It never ceases to amaze me how successful you have been making yourself so small, petty, and banal with your tweets," Brennan said at the time. "Your insecurity is well deserved, as is your concern over Russia investigation. Thomas Paine was right when he said, 'These are the times that try men's souls.'"