I didn't say it was entirely Bush's fault. Only partially. However, Bush's failure to provide any alternative-energy leadership for the world's biggest energy consuming nation (and the world's best innovator), was an important factor. More immediately important was Bush's role in radically destablizing the Middle East, with his invasion of Iraq and saber-rattling towards Iran. That insecurity made it harder to maintain a growing supply of oil from the region, and helped to fuel the atmosphere of speculation that has taken hold on the oil market. Historically, Bush's utter mismanagement of the aftermath of Katrina did something similar on a smaller scale, by interfering with the Gulf refineries.