Existing scholarship on the Iraq War decision-making process generally treats the event as a logical extension of pre-existing ideas and policies. This paper considers the Bush administration's decision to absorb Iraq into the broader War on Terror as a deviation from long-held views of Saddam Hussein. I argue that the decision to incorporate Iraq into the wider post 9/11 mission was pathologically driven by groupthink, which caused a shift in the administration's view of Saddam from a troubling dictator to an existential threat to US security. Therefore, groupthink can simultaneously explain the defects in the decision-making process and the shift from cautious restraint to accelerated urgency with respect to US relations with Iraq.