As I've already said, the main question will not be how many Sunnis participate in the December elections--since more than anticipated probably will--but what happens in the likely event that when they try to amend the constitution after the election---since most of the main questions of government have been put off--- all their amendments are soundly defeated.

Will that cause them to support the insurrection in greater numbers, and if so what will Bush do?

Putting in more troops is becoming progressively less of an option for him--virtually everybody across the political spectrum is talking about taking troops out, not putting more in. The only question is when and under what conditions to withdraw. Since Murtha's statement, there's been a sea change.