That item might have looked preposterous in early August, when U.S.-Iraq negotiations were just beginning. But it looks prescient now, because the White House essentially has chosen to pull the plug on a large-scale U.S. deployment to Iraq, regardless of what the Iraqis think. (It is possible that the Iraqis would not approve more than 4,000 troops, but how would we know without pushing for a higher figure?) Joe Biden—who supported the decision to invade Iraq but opposed the surge and instead proposed breaking Iraq into three different parts—appears ascendant on both Iraq and Afghanistan policy. He seems to have been looking for an excuse to leave Iraq, and Iraqi foot-dragging, which is to be expected in such a rickety parliamentary system, provided it to him.
When President Obama announced in October of 2011 that no U.S. troops would be left in Iraq, he said he was fulfilling a campaign promise. That's certainly at odds with how he now portrays the decision to withdraw all U.S. forces from Iraq.