Monica Crowley at an event in Washington, DC, in 2015. Getty/ Dave Kotinsky

President-elect Donald Trump's pick for director of strategic communications for the National Security Council is facing new allegations of plagiarism.

A report in Politico Magazine published Monday accuses Crowley of plagiarizing several passages in her Ph.D. dissertation submitted in 2000 while she attended Columbia University.

The report follows revelations by CNN that Crowley may have plagiarized portions of her 2012 book.

An examination from Politico Magazine found more than a dozen instances in which the magazine said text was lifted with little to no changes, improperly attributed to the original source, or not attributed at all.

Politico Magazine's examination included side-by-side comparisons of text found in portions of Crowley's dissertation.

Both Columbia University and the professor who advised Crowley declined to comment to Politico Magazine about the plagiarism allegations.

An investigation by CNN's KFile published Saturday first revealed more than 50 examples in Crowley's 2012 New York Times best-seller that appear to have been lifted verbatim from a variety of columnists, think tanks, and Wikipedia.

Crowley has a history of plagiarism allegations dating back several years, according to Slate. The publication points to an editorial feature Crowley wrote for The Wall Street Journal in 1999 that was found to have borne "striking similarities in phraseology" to a 1988 article by Paul Johnson in Commentary magazine.

The Journal said in an editor's note published after the fact that "had we known of the parallels, we would not have published the article."

CNN quoted Trump's transition team in its article Saturday as saying it continued to support Crowley's appointment.

"Any attempt to discredit Monica is nothing more than a politically motivated attack that seeks to distract from the real issues facing this country," a member of Trump's transition team told CNN.