After the elections, political power will be held by the Shiites and the Kurds.
The Shiites and the Kurds can then:
A. Choose to allow the U.S. to give them military support as they defeat the Sunni thugs.
B. Ask the Americans to leave and so that the Sunni thugs can subjugate and slaughter the Shiites and the Kurds again.
I vote for "B". (Cause that's the way I think it's going to happen)