Throughout the 20th century the Republican Party benefited from a non-interventionist foreign policy. Think of how Eisenhower came in to stop the Korean War. Think of how Nixon was elected to stop the mess in Vietnam.
No thieves no traitors no interventionists! This time the revolution is for real!
In time it will become clear to everyone that support for the policies of pre-emptive war and interventionist nation-building will have much greater significance than the removal of Saddam Hussein itself.