I wonder just how much of Saudi Arabia could be overrun by the 100,000+ soldiers currently in Iraq? Then the Saudis ability to support the Sunnis in Iraq would be reduced to near zero from oil revenue. The Saudis would be fools to issue any sort of ultimatum to the U.S. that involved the threat of military action as they could not possibly prevent the U.S. from an overwhelming victory against their forces.
"they could not possibly prevent the U.S. from an overwhelming victory against their forces."
With demonrats in power, they'll never have to. They could invade Cincinnati with no fear of effective military action by the US.