Almost the entirety of the Iraq war as well as all major decisions which affected the outcome were under the Bush administration. In 2008, the Bush administration agreed to withdraw all US troops from Iraq, and the Obama administration completed it. While US forces have returned to Iraq repeatedly since then to deal with various issues such as ISIS which are intimately linked to the mishandling of the Iraq war, there have been a number of other developments in the middle east such as the arab spring and the Saudi-Iranian cold war which are much more proximate to these separate conflicts.