In 1994, President Bill Clinton called federal appellate court Judge and fellow Arkansan Richard Sheppard Arnold "the most brilliant man on the federal bench." But for concerns about Arnold's poor health, Clinton would have nominated him to fill the vacancy on the Supreme Court left by the retirement of Justice Harry A. Blackmun. Indeed, when the Blackmun position on the court opened up, Arnold received the endorsement of more than 100 federal judges--almost...