Slate.com is presently running a series, called ''Who's Winning, Who's Losing, and Why'' that includes an ongoing dialogue, since the conclusion of the presidential election, concerning the reasons the Democrats failed in this most recent and other elections. The header includes a review of recent editions by such writers and thinkers as Chris Suellentrop, William Saletan, and Timothy Noah who, for their parts, blame the lack of Democratic success on Kerry's ''too nuanced and technocratic'' approach (Suellentrop); on a failure to base campaigns on ''values and moral responsibility'' like Bill Clinton did (wow!) (Saletan); or the lack of the right...