The order would never come down. Obama recieved massive support from American jews. Care to guess how quickly that would dissapear if he ordered such attacks?
They don't have that much of a recent track record for making their election decisions based on how it's going to work out for Israel.
Really, I don't see the US actively permitting a third player to launch and recover an attack mission through controlled war zone airspace against a fourth uninvolved player.
Since the defense of Iraq is theoretically in the hands of Iraqis, or in the process of being turned over to them for principal responsility, there is a whole dimension to taking ourselves out of the loop on it that ZB leaves completely unexplored, however.