Donald Trump’s pick for a senior communications job at the National Security Council, Monica Crowley, has stepped down after a CNN investigation uncovered repeated incidents of plagiarism. The radio talk show host and Fox News contributor said she would relinquish her appointment and would remain in New York. Her announcement came after CNN reported incidents of plagiarism in her 2012 book, her columns for The Washington Times and her 2000 Ph.D. dissertation for Columbia University.