(CNN) — Harvard President Claudine Gay is back in the hot seat as the embattled leader requested additional corrections of her past work, and a House committee widened an existing probe of Harvard to include an investigation into allegations of plagiarism. In a statement to CNN on Thursday morning, a Harvard spokesperson said the university reviewed more of Gay’s academic work, and the president plans to update her 1997 PhD dissertation to correct additional instances of “inadequate citation.” But Harvard did not use the word “plagiarism” in its review of Gay’s work, and the university said Gay’s past mistakes did...