THE WONDERFUL thing about writing commentary pieces is that I get ample feedback, often from people unencumbered by the niceties of interpersonal diplomacy. Last week, I did what you might expect a conservative columnist to do. I told young orphans there is no Santa Claus. No, no, just kidding. (Besides, I'd have gotten a better reaction closer to the holidays.) No, I merely cataloged the troubles of the Democratic Party. The infuriated response from hordes of liberal readers was, "How could you criticize the Democrats when the Republicans are in so much more trouble?" Fortunately they provided their own answers,...