Comey called Rosenstein “a very independent-minded, career-oriented person”,   This is not a positive comment.  Career-oriented translates to me as ambitious.  Were I Rosenstein (a Jew presumably despite Trump's alleged antisemitism), I would have been pissed.  The democrats are desperate to make political hay out of the Comey matter, but the action may very well stem from a strong dislike between Rosenstein and Comey.