Maybe I'm mistaken but I believe we won the war a while ago and now the nation building isn't wrapping up as quickly as people would like it to.
Here's where things get sticky, though: in terms of "winning" the war, can you really separate the nation building from the fighting? Will we have "won" if Iraq ends up being as -- or more -- dangerous than when Saddam was in power?
"Winning" in Iraq has to be defined in terms of what happens after we're gone -- a stable, non-agressive Iraq, for example.
Then again, Iraq isn't really "the war," at all. It's just a theatre of the war. The main event has more to do with Islamic totalitarianism ... a fuzzy, ill-defined mess. It's not certain that there's any real head to it ... though Iran certainly seems to be trying to take a leadership position.