With an interesting take:
Insult to Injury in Iraq: "Americans believe that all problems are soluble and therefore that people who aren't solving their problems must not be trying. They need to be 'incentivized,' either through promises or threats. Many on the left have long been advocating a withdrawal of U.S. forces, or the threat of it, as just such an incentive for the Iraqis. But what if even then Iraqis cannot accomplish the goals we have set for them? Can we then declare that, by establishing the Iraqi army and helping Iraq elect and establish its government, we have done all that honor requires?
No, we can't. Both honor and our vital national interest require establishing conditions in Iraq that will allow the government to consolidate and maintain civil peace and good governance. It doesn't matter how many 'trained and ready' Iraqi soldiers there are, nor how many provinces are nominally under Iraqi control. If America withdraws its forces before setting the conditions for the success of the Iraqi government, we will have failed in our mission and been defeated in the eyes of our enemies. We will have dishonored ourselves."