WASHINGTON, DC - MAY 09:  National Security Adviser John Bolton speaks on a morning television show from the grounds of the White House, on May 9, 2018 in Washington, DC. Yesterday President Donald Trump announced that America was withdrawing from the Iran nuclear deal.  (Photo by Mark Wilson/Getty Images)
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WASHINGTON, DC - MAY 09: National Security Adviser John Bolton speaks on a morning television show from the grounds of the White House, on May 9, 2018 in Washington, DC. Yesterday President Donald Trump announced that America was withdrawing from the Iran nuclear deal. (Photo by Mark Wilson/Getty Images)
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WASHINGTON, DC - MAY 23: Former Director of the U.S. Central Intelligence Agency (CIA) John Brennan testifies before the House Permanent Select Committee on Intelligence on Capitol Hill, May 23, 2017 in Washington, DC. Brennan is discussing the extent of Russia's meddling in the 2016 U.S. presidential election and possible ties to the campaign of President Donald Trump. (Photo by Drew Angerer/Getty Images)
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WASHINGTON, DC - MAY 23: Former Director of the U.S. Central Intelligence Agency (CIA) John Brennan testifies before the House Permanent Select Committee on Intelligence on Capitol Hill, May 23, 2017 in Washington, DC. Brennan is discussing the extent of Russia's meddling in the 2016 U.S. presidential election and possible ties to the campaign of President Donald Trump. (Photo by Drew Angerer/Getty Images)
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WASHINGTON, DC - MAY 23: Former Director of the U.S. Central Intelligence Agency (CIA) John Brennan testifies before the House Permanent Select Committee on Intelligence on Capitol Hill, May 23, 2017 in Washington, DC. Brennan is discussing the extent of Russia's meddling in the 2016 U.S. presidential election and possible ties to the campaign of President Donald Trump. (Photo by Drew Angerer/Getty Images)
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WASHINGTON, DC - MAY 23: Former Director of the U.S. Central Intelligence Agency (CIA) John Brennan testifies before the House Permanent Select Committee on Intelligence on Capitol Hill, May 23, 2017 in Washington, DC. Brennan is discussing the extent of Russia's meddling in the 2016 U.S. presidential election and possible ties to the campaign of President Donald Trump. (Photo by Drew Angerer/Getty Images)
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(CNN) —  

Former CIA director John Brennan said Sunday that he was willing to pursue legal action against President Donald Trump after he revoked Brennan’s security clearance earlier this week.

“If my clearances and my reputation, as I’m being pulled through the mud now, if that’s the price we’re going to pay to prevent Donald Trump from doing this against other people, to me it’s a small price to pay,” Brennan said on NBC’s “Meet the Press.” “So I am going to do whatever I can personally to try to prevent these abuses in the future, and if it means going to court, I will do that.”

Brennan, a harsh critic of Trump, also stood by his comments last month when he called Trump’s actions alongside Russian President Vladimir Putin in a news conference after their summit in Helsinki, Finland, “nothing short of treasonous.”

Trump revoked Brennan’s security clearance Wednesday, saying Brennan’s history “calls into question his objectivity and credibility.” Trump later connected his decision to revoke Brennan’s clearance with the former CIA director’s involvement in the Russia investigation, The Wall Street Journal reported.

“I call it the rigged witch hunt, [it] is a sham. And these people led it!” Trump told the newspaper. “So I think it’s something that had to be done.”

Brennan also filed an op-ed in The New York Times on Thursday morning in which he called Trump’s denials of Russian interference in US elections “hogwash.”