TigerHawk thinks so:
From the perspective of Democratic political strategy, the worst possible result would be partial success — for conditions in Iraq to improve significantly and palpably, but not decisively. That would guarantee that Iraq would remain a central theme in the 2008 campaign, not just as fodder for attacks on Republican “incompetence,” but as a problem to be solved in the future, and that would be a nightmare for the leading Democrats. This is the reason, I believe, why at least some leading Democrats are so obviously willing the surge to fail.
Interestingly, the enemy also seems to be afraid of the surge. Under the headline, “Death squad chieftains flee to beat Baghdad surge,” the Times of London reported not only that the new plan was motivating “death squad chieftains” to leave the country, but that Iran was sheltering the enemy.