The US will "leave" Iraq. In reality, we'll keep our 14 Fort Apaches there and call it a victory. The US populace will be fooled into thinking we've left; the Arabs not.
As a result, there WILL be some successful strikes on US soil. My guess: subways, trains, shopping centers. Only a matter of time.
BushCo will then be vindicated and usher in Patriot Act III, IV and V.
Either that or the country collapses.
We are all turkeys today; welcome to the feast.