When asked about whether the surge worked, the Democrats at tonight’s debate give us the best sense of why a Republican can win in November. They are all desperate to sell failure — only moments after an ABC report flatly said that the surge has succeeded to reduce violence in Iraq in a huge way. If, ten months from now, the election becomes a referendum about declaring defeat and going home or accepting signs of success and figuring out how to build on it, the success team will be in a much better place.