Clark Candidacy Shakes Up Democratic Field A week after announcing his candidacy for the Democratic presidential nomination, retired Gen. Wesley Clark appears to be a frontrunner. The latest USA Today-Gallup poll shows Clark in a statistical dead heat with President Bush. But as a first-time candidate for office, Clark has made some blunders. Hear NPR's Mara Liasson, E.J. Dionne of The Washington Post and David Brooks of The New York Times.