Krauthammer today:
We don’t yet know if this strategy will work in mixed Sunni-Shiite neighborhoods. Nor can we be certain that this cooperation between essentially Sunni tribal forces and an essentially Shiite central government can endure. But what cannot be said — although it is now heard daily in Washington — is that the surge, which is shorthand for Gen. David Petraeus’s new counterinsurgency strategy, has failed. The tragedy is that, just as a working strategy has been found, some Republicans in the Senate have lost heart and want to pull the plug.