With the recent defeat of Louisiana Sen. Mary Landrieu — which leaves three Democratic Southern U.S. Senators — the common wisdom is that Democrats should bid farewell to the South. Even with favorable changing national demographics that benefit Democrats, an abandonment of the South and, on a larger scale, a viable moderate wing would be a mistake. Recently, writer Michael Tomasky argued that the South, a “reactionary, prejudice-infested” region, should be left to Republicans to create a “free market Jesus paradise.” Few sentiments better show what is wrong with Democrats today and why ironic Republican arguments that it is the...