Saddam Husayn remains the chief of state of Iraq (or a successor state comprising at least 50% of the current land area of Iraq) longer than George W. Bush remains chief of state of the United States. To be considered chief of state, a person must reside within the country and be so recognized by at least three of the five permanent members of the UN Security Council.
In case of ambiguity, I will judge this claim primarily on intent. Should the percentage of land-area become unclear, percentage of population in successor states and location of current national capitol (i.e. Baghdad and Washington) will be used as deciding factors. These criteria apply to the U.S. as well as Iraq.
(It is understood the claim is referring to Saddam Hussein, current leader of Iraq. The spelling of the name is irrelevent.)