Put a public school teacher in the governor's mansion and you'll have a pedagogue as the chief executive every time. It really doesn't matter how long she's in office, she'll always be a schoolmarm who's out of her element and in over her head—the Peter Principle epitomized. Unfortunately for the people of New Orleans, it took a crisis of cataclysmic proportions in which thousands of people suffered physical deprivation and emotional humiliation—and hundreds died before anyone realized that when you elect a follower as your leader, no one makes realistic plans for the crisis until a catastrophe occurs, and while...