Collins: Comey should have waited to release his memoir

Sen. Susan CollinsSusan Margaret CollinsMurkowski echoes calls for Kavanaugh, accuser to testify Kavanaugh, accuser to testify publicly on Monday White House says Kavanaugh ready to testify over 'false allegation' MORE (R-Maine) said on Sunday that 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 should have waited to release his highly anticipated memoir due to the ongoing Russia probe. 

"Don't write a book in the middle of an investigation that is ongoing," Collins told NBC's Chuck Todd on "Meet the Press." 

Collins went on to express concerns that the book could potentially interfere with special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE's probe into alleged ties between the Trump campaign and Russia's election meddling. 

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"I cannot imagine why an FBI director would seek to essentially cash in on a book when the investigation is very much alive. He should have waited to do his memoir," she said. 

The senator also hit the former intelligence officer on his handling of past investigations and leaking of classified documents. 

"If I were advising a future FBI director, I would say two things. One, always follow the Department of Justice's protocols and guidelines, which unfortunately James Comey did not do with the Hillary ClintonHillary Diane Rodham ClintonTrump to declassify controversial text messages, documents related to Russia probe Hypocrisy in Kavanaugh case enough to set off alarms in DC Clinton: Hard to ignore 'racial subtext of virtually everything Trump says' MORE investigation, and he did not do when he leaked documents, which were FBI work documents, to a friend of his, knowing that they would go to the press," she said. 

Collins's remarks follow Comey's media blitz promoting his memoir, "A Higher Loyalty: Truth, Lies, and Leadership."

Comey has appeared on ABC's "20/20" and "The View," CBS's "Late Show with Stephen Colbert," NBC's "Today," and CNN's "The Lead," among numerous other television and radio appearances.

Comey also appeared at a town hall hosted by The New Yorker on Thursday night, where he told editor David Remnick that he doesn't "crave to be known," while stating 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 has a hunger for affirmation.

He has defended his decisions about the 2016 investigation into Clinton's emails and giving some of his memos to a friend in order to make the contents public, and said his decision to release the book doesn't hurt Mueller's ongoing investigation even if he's called upon to be a witness.

“My testimony is already locked down,” Comey told WTOP. “I gave it under oath to the Senate a year ago. In fact, even before then, it was locked down because I wrote memos about key events and so there really isn’t a serious risk that my story will somehow change. It’s in concrete, frankly, and I’ve offered it to the Senate and to the American people, already.”