Brennan admits 'there were mistakes made' in FISA applications, suggests FBI was 'overly aggressive'

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FISA court orders FBI to fix wiretaps amid IG report

Fox News contributor Sara Carter, American Conservative Union chair Matt Schlapp, and conservative commentator Dinesh D'Souza share their reaction.

Former CIA Director John Brennan, an outspoken critic of President Trump, acknowledged Tuesday that "there were mistakes made" in the highly controversial Foreign Intelligence Surveillance Act (FISA) application process during the Russia investigation as reported by Justice Department Inspector General Michael Horowitz.

Appearing on MSNBC, Brennan was asked by host Chris Hayes about "abuses" uncovered by Horowitz, who claimed he found 17 significant errors in the renewed FISA applications into former Trump campaign adviser Carter Page, while Horowitz was a member of the Obama administration.

"Well clearly, there were mistakes made based on the inspector general's reports," Brennan responded. "And I know that a lot of people attribute it to either to incompetence or politicization. Well, I might just attribute it to, these were FBI agents who were doing their level best to try to prevent Russia interference in the election."

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He continued, "They were probably overly aggressive, they didn't pay careful enough attention to some of the details, they may have ignored some aspects of the work that was uncovered. But I think the IG was very clear that politicization did not seem to creep into any aspect of their work either at the initiation of the investigation or throughout."

"They were probably overly aggressive, they didn't pay careful enough attention to some of the details, they may have ignored some aspects of the work that was uncovered."

— John Brennan, former CIA director

​​​​​​​Former CIA Director John Brennan testifies on Capitol Hill in Washington, before the House Intelligence Committee Russia Investigation Task Force, May 23, 2017. (Associated Press)

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Brennan then echoed FBI Director Christopher Wray, saying "these are issues that really need to be addressed  because the FISA court does have tremendous authority to allow the bureau to investigate the activities of U.S. citizens."