I really don’t think the fall of some communist regimes (China and Cuba still claim to be communist, even if they’ve liberalized their economies a great deal in the past decade) or the break up of the Soviet Union (into the CIS, which Russia still dominates, as we see in the Ukraine now and in Georgia earlier) really had anything to do with the United States. I know conservatives love to take credit for it because they happened to be in power while it happened - don’t blame them, the liberals would have done it too - but really the United States had very little to do with the problems the soviets experienced at the beginning of the 90s.
As far as the Iraq War, I doubt I’d take that as a policy win since it was bungled after the fact just like the second Iraq War. Or you could say it was bungled in that it needed to happen in the first place. Sure, it was a military success, but then you have to argue that Bush Sr. deserves the credit for that. Pretty much any president in the last 50 years, possibly excluding Carter, could have had the same level of military success, if not more.