Political and military gains in Iraq have been substantial and real since the surge. But they can be reversed if American troops are pulled out too quickly or too soon.

UPDATE: The best reporter in Iraq says the war is pretty much over:

Money Q:

"The war continues to abate in Iraq. Violence is still present, but, of course, Iraq was a relatively violent place long before Coalition forces moved in. I would go so far as to say that barring any major and unexpected developments (like an Israeli air strike on Iran and the retaliations that would follow), a fair-minded person could say with reasonable certainty that the war has ended. A new and better nation is growing legs. What's left is messy politics that likely will be punctuated by low-level violence and the occasional spectacular attack. Yet, the will of the Iraqi people has changed, and the Iraqi military has dramatically improved, so those spectacular attacks are diminishing along with the regular violence. Now it's time to rebuild the country, and create a pluralistic, stable and peaceful Iraq. That will be long, hard work. But by my estimation, the Iraq War is over. We won. Which means the Iraqi people won."