How Will Petraeus Deal With Karzai?

Joe Klein asks:

How will Petraeus see Karzai: as the boss (the final arbiter of military action), a partner or a subordinate? The latter is clearly out--those who've gotten into fights with Karzai, like Holbrooke and Ambassador Karl Eikenberry, have lost. But the former isn't getting us anywhere. Petraeus had some dicey moments with President Maliki in Iraq, but he managed to build a successful partnership. Can he do the same in Afghanistan? (One big problem: Maliki was the exact opposite of Karzai, pushing for more aggressive military action--and it was his unilateral decision to attack Basrah that finally made him a credible president in the eyes of Iraqis.)