I seriously doubt we'll take on Iraq any time in the near future. We're still bogged down in Afghanistan and Pakistan trying to prove there's more than a handful of locals who could ever be US friendly.
An attack on Iraq would mean our people in Afghanistan and Pakistan would be instantly slaughtered. Not to mention the troops in Saudi or even Indonesia. We have to pretend that Islam is a religion of peace, so we can build our oil pipelines--no matter how many in the West or Israel are slaughtered.