A week ago Saturday, the full Senate voted, 50-48, to confirm Brett M. Kavanaugh as the next Supreme Court justice. The two-vote margin is the second closest of those Supreme Court nominees who have received a Senate vote. (Of the 119 nominees, including five who were both associate justices and chief justices, about half were confirmed by Senate acclamation.)The closest margin in history was by one vote (24-23) for Stanley Matthews, President James Garfield’s lone Supreme Court nomination. In what is a huge anomaly …