Sen. Barack Obama leads in the Democratic presidential nomination race in both the popular vote and delegate count, but still lacks the magic number to secure the nomination. So there's no shortage of opinion as to what the Democratic Party's superdelegates should do. Take for example the comments of Christine Pelosi, daughter of House Speaker Nancy Pelosi and herself a superdelegate, who recently said: "I think that as a superdelegate my vote shouldn't be more important than that of an entire congressional district, and that's why I'm not going to overturn the verdict of the American people." Her sentiments are common, but if the job of superdelegates is simply to mirror the "verdict" of the electorate, why have them at all? ...