Bush was apparently so inexperienced and over his head with the job as president, that he relied heavily on those who worked for him. He apparently does not have the patience for great detail and kinda feel in line with the arguments and proposed actions that were sold to him by people who knew exactly where his buttons were and when and how they should push them. Cheney caused, in my opinion, the most damage and seems to have had no trouble essentially running the foreign policy of the Bush administration. This article describes, by people with heavy knowledge in the various fields being discussed, the machinations of how interested parties got their way through the president.