Former CIA Director John BrennanJohn Owen BrennanRetired admiral resigned from Pentagon advisory committee after writing open letter to Trump Rand Paul ramps up his alliance with Trump Hillicon Valley: Trump signs off on sanctions for election meddlers | Russian hacker pleads guilty over botnet | Reddit bans QAnon forum | FCC delays review of T-Mobile, Sprint merger | EU approves controversial copyright law MORE confirmed on Sunday that he has not met with special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE as part of the probe into alleged ties between the Trump campaign and Russia. 

"No, I have not," Brennan told Chuck Todd on NBC's "Meet the Press." 

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Brennan added that he was not surprised that Mueller has not yet reached out to him. 

"I think Mr. Mueller would have had access to CIA files that he needed. And, again, CIA's role is not to look at the activities of individual Americans by any means. But I think there's a full record there and there are individuals at the agency who can provide the insight to Bob Mueller's team that they need," Brennan said. 

Brennan is a frequent critic of President TrumpDonald John TrumpOver 100 lawmakers consistently voted against chemical safeguards: study CNN's Anderson Cooper unloads on Trump Jr. for spreading 'idiotic' conspiracy theories about him Cohn: Jamie Dimon would be 'phenomenal' president MORE and lashed out at the president last week on Twitter following Trump's attacks on former FBI Director James ComeyJames Brien ComeyComey tweets: 'We always emerge stronger from hard times' Trump to declassify controversial text messages, documents related to Russia probe Lisa Page bombshell: FBI couldn’t prove Trump-Russia collusion before Mueller appointment MORE.  

Trump ripped Comey after various excerpts of his new book were released to the media last week. 

Among the anecdotes in Comey's book is the assertion that the president asked Comey to probe an alleged tape detailing one of the most salacious parts of the dossier compiled by former British spy Christopher Steele.