The publisher of a book by Monica Crowley, President-elect Donald Trump's pick for a top National Security Council post, said Tuesday that it will stop selling copies until she addresses allegations of plagiarism.

Crowley, a conservative pundit whom Trump named as the NSC’s senior director of strategic communications, is also under fire for allegedly plagiarizing passages in her PhD dissertation at Columbia University. 

CNN reported Saturday that Crowley's 2012 book, “What the (Bleep) Just Happened?” lifted work from columnists, news reports, articles and think tanks without proper attribution.

“The book, which has reached the end of its natural sales cycle, will no longer be offered for purchase until such time as the author has the opportunity to source and revise the material,” publisher HarperCollins said in a statement Tuesday.

In a statement issued Tuesday, Columbia University declined to comment on Crowley's situation and said its “process for addressing concerns raised about University research preserves the confidentiality of any review, and even the fact of a review’s existence is confidential while it is underway.” The statement also noted that Columbia “is committed to upholding the very highest standards of integrity and credibility in academic research.”

The Trump transition team did not respond to a request for comment on Tuesday.

In recent days, the team has voiced support for Crowley.

A statement issued by the transition before the Harper Collins decision said, “Monica’s exceptional insight and thoughtful work on how to turn this country around is exactly why she will be serving in the Administration.”

“Any attempt to discredit Monica is nothing more than a politically motivated attack that seeks to distract from the real issues facing this country,” the statement said.

As a White House aide, Crowley does not face confirmation proceedings.

Politico reported Monday that Crowley’s 2000 dissertation contained more than a dozen sections of text that have been lifted, with little to no changes, from scholarly works without proper attribution.

The dissertation was titled “Clearer Than Truth: Determining and Preserving Grand Strategy: The Evolution of American Policy Toward the People’s Republic of China Under Truman and Nixon.”