Good article over at Foreign Affairs. The bit that jumped out and grabbed me by the throat:
As long as the Bush administration remains absolutely committed to propping up the government of Prime Minister Nouri al-Maliki or a similarly configured successor, the U.S. government will have limited leverage with almost all of the relevant parties. By contrast, moving away from absolute commitment -- for example, by beginning to shift U.S. combat troops out of the central theaters -- would increase U.S. diplomatic and military leverage on almost all fronts. Doing so would not allow the current or the next U.S. administration to bring a quick end to the civil war, which most likely will last for some time. But it would allow the United States to play a balancing role between the combatants that would be more conducive to reaching, in the long run, a stable resolution in which Sunni, Shiite, and Kurdish interests are well represented in a decent Iraqi government. If the Iraqis ever manage to settle on the power-sharing agreement that is the objective of current U.S. policy, it will come only after bitter fighting in the civil war that is already under way.