If Obama is to have any chance of succeeding in winding down the U.S. military engagement with some semblance of accomplishment and honor, he must end the policy divisions within his administration and the insubordination of military leadership on the ground. These efforts must start with a decisive heave-ho of General McChrystal. Anything less will reinforce the emerging calculation that Obama is a wuss.
Having Petraeus take over Afghanistan is a skewed move by Obama to have the popular general absorb fall out from a likely Afganistan mission failure. The mission will probably also eliminate Petraeus as a potential 2012 Presidential candidate.