WASHINGTON - Actors have a recurring nightmare. In it, they appear on stage wearing nothing but a short undershirt and an ingratiating smile. It's all out there in the footlights for inspection. I was reminded of this at the weekend, when nine Democrats seeking their party's nomination to challenge George W. Bush in the 2004 presidential election sparred in their first formal debate in Columbia, South Carolina. The eight men and one woman on stage are not peas in a pod; they range in plausibility from the maybe possible to the utterly hopeless. They're all experienced politicians, and some have...