In introducing his last Supreme Court nominee 13 months ago, President Obama gushed forth like an out-of-control oil spill about what he saw as Sonia Sotomayor’s main qualification—her “wisdom accumulated from an inspiring life's journey.” Obama lavishly praised her “distinguished career,” which included having worked “at almost every level of our judicial system.” All this courtroom time, he assured us, provided Sotomayor “with a depth of experience and a breadth of perspective that will be invaluable as a Supreme Court justice.” “Walking in the door,” he continued, “she would bring more experience on the bench and more varied experience on...