I don't know whether to rate this a 1 or a 5 and it all depends on the "whatever that means" qualifier. Certainly, as others have said, the US has a responsibility to clean up.
As FWY said, the job is undefined, and it seems to me that the US may define the 'job being done' in a different fashion to the local Iraqi government.
Example: Is the 'job done' if violence has abated and a democratic Iraqi government is in place with strong ties to Iran - a scenario which is becoming more and more likely? Or is it not more likely that the job will not be considered done by the US, until the Iraqi government is more ideologically in line with the US, and that will certainly not be easy to achieve.
