Winning and Election 2008

One of the issues that keeps coming up in the presidential campaign is: Are we winning in Iraq? John McCain, an American hero, says if we leave Iraq abruptly, al-Qaeda wins. Will someone please tell me what would define a win. More Iraqi's killed than Americans? Would a win be freedom and democracy in Iraq (that will probably take 50 to 100 years)? It is my opinion that enough American and Iraqi blood has been spilled. In war everyone loses to some extent. If no one can define a win, then let's declare one and bring our brave and fatigued troops home.