Monica Crowley smiles as she exits the elevator in the lobby of Trump Tower in New York, Thursday, Dec. 15, 2016. President-elect Donald Trump announced Crowley as senior director of Strategic Communications for the National Security Council. Evan Vucci AP
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As evidence of the claim, CNN highlights more than 50 passages from news stories, columns and other websites, including Wikipedia. The outlets include the Wall Street Journal, Fox News, Yahoo News, the Associated Press, Los Angeles Times, National Review, New York Times, Politico, the BBC, New York Post, Bloomberg, Investopedia and others.

Here are a few examples, with help from Business Insider.

Wall Street Journal commentator Michael J. Boskin wrote, “As Milton Friedman taught decades ago, the true burden on taxpayers today is government spending; government borrowing requires future interest payments out of future taxes.”

Crowley wrote in her book, “As the late great economist Milton Friedman pointed out, the true burden on taxpayers is government spending because government borrowing demands future interest payments out of future taxes.”

An AP article reads, “There may be individual millionaires who pay taxes at rates lower than middle-income workers. bIn 2009, 1,470 households filed tax returns with incomes above $1 million yet paid no federal income tax, according to the Internal Revenue Service. But that's less than 1 percent of the nearly 237,000 returns with incomes above $1 million.”

Crowley wrote, “There may be some individual millionaires who pay taxes at lower rates than middle-income folks. According to the IRS, in 2009 there were 1,470 households that filed tax returns with incomes above $1 million but paid no federal income tax. But that’s less than 1 percent of the 237,000 returns showing incomes over $1 million.”

A Wikipedia article reads, “In December 2007 CIA director Michael Hayden stated that “of about 100 prisoners held to date in the CIA program, the enhanced techniques were used on about 30, and waterboarding used on just three.”

The exact same passage appears in Crowley’s book with no attribution.

Perhaps the most bizarre instance of alleged plagiarism came from a 2004 website about “pork barrel spending” listed on a podiatrist’s website.

Is this the first time Crowley has been accused of plagiarism?

No. In 1999, Crowley wrote a column for the Wall Street Journal titled “The Day Nixon Said Goodbye,” per Slate. Later, however, the Journal published an editor’s note that said there were “striking similarities in phraseology between "The Day Richard Nixon Said Goodbye," ... and a 1988 article by Paul Johnson in Commentary magazine ... Had we known of the parallels, we would not have published the article.”

As CNN reports, Crowley was quoted in a New York Times article at the time saying that while she did see the similarities in wording, “'I did not, nor would I ever, use material from a source without citing it.”

What have she and Trump’s team said in response to CNN’s report?

Crowley did not respond to requests for comment from CNN, nor did her publisher, HarperCollins. A Trump transition spokesperson, however, issued a statement in support of Crowley.

“Monica’s exceptional insight and thoughtful work on how to turn this country around is exactly why she will be serving in the Administration,” the statement read. “HarperCollins—one of the largest and most respected publishers in the world—published her book which has become a national best-seller. Any attempt to discredit Monica is nothing more than a politically motivated attack that seeks to distract from the real issues facing this country.”

This is the second instance of plagiarism inside Trump’s team, with the first being Melania Trump’s speech at the Republican National Convention that recycled phrases from a Michelle Obama tweet. The speechwriter who helped Melania Trump write her speech, offered her resignation after the controversy, but Trump did not accept the resignation, per CNN.