The people being elected this round aren't going to decide anything except the constitution and rules that will determine what the final form of the government will be, and how the elections will proceed. Unless things go very wrong, they will have little regulatory power right away. Now it's possible they'll just write a constitution that keeps themselves in power, but I think there are going to be enough of them that it'll be difficult for them to pull a fast one like that.
The NEXT elections though... Those guys will have direct power, legitimized by the new constitution. If they want us to leave, or if the constitutional committee writes the rules to guarantee a governing system that will definatly kick us out, then so be it. If they don't want free education, medical, electrical, and other service infrastructure, and they VOTE to turn away another year or two of such assistance, then they deserve to live in the dark. I don't think they'll just give all that away though. Sure they'll want us out, some sooner than others, but even the most power hungry or those most offended by our presence can't ignore the potential benefits of letting us finish some rebuilding efforts before giving us the boot.
And that's cool with me. With Iran, India, and Pakistan playing with nukes, and Saudi Arabia having an internal crisis of it's own, an Iraq with a strong infrastructure but almost no offensive military power will be a source of stability in the region. That's good for everyone but the religious nutjob whackos.