I am no particular fan of any politician, George W. Bush included. However, it serves no one to add extra conspiracy theories to the plenty of more likely things one can say of a leader.
One conspiracy theory popular nowadays is that Bush is in league with oil companies. Maybe it is true, but he does not seem to particularly act like it. Most strikingly, his most famous action will, if it works, result in Iraq selling oil on the world market and thus lowering world oil prices.
But more straightforwardly, why did Bush act to reduce oil prices just after Hurricane Katrina? If he had simply done nothing, oil and gas prices would have risen even more than they did, to the benefit of oil companies that were still active after the hurricane hit. Instead, he immediately acted to sell 30 million barrels of oil from the Strategic Reserve.
Do not take me wrong--politicians respond to all kinds of special interests, and I am sure Bush does, too. But why do so many people choose oil? If Bush is really giving favors to oil companies, why did he lower gas prices after Hurricane Katrina?