There is, in fact, something astonishing about the ascent of Chris Christie, who is about as slick as sandpaper and who now admits that even he didn't think he would beat Jon Corzine, the Democrat he unseated in 2009. Some critics have posited that Christie's success in office represents merely the triumph of self-certainty over complexity, the yearning among voters for leaders who talk bluntly and with conviction. Yet it's hard to see Christie getting so much traction if he were out there castigating, say, immigrants or Wall Street bankers. What makes Christie compelling to so many people isn't simply plain talk or swagger, but also the fact that he has found the ideal adversary for this moment of economic vertigo. Ronald Reagan had his "welfare queens," Rudy Giuliani had his criminals and "squeegee men," and now Chris Christie has his sprawling and powerful public-sector unions — teachers, cops and firefighters who Christie says are driving up local taxes beyond what the citizenry can afford, while also demanding the kind of lifetime security that most private-sector workers have already lost.