I know Bush "can't" control gas prices, but I also know that a lot of people don't understand this.
Supposedly, he could also relax environmental regulations, etc. on new refineries. Trouble is (and this is a pet peeve of mine) that building a new refinery takes years, not months. People are clamouring for one, and they think it will reduce gas prices (back to $1 a gallon, no less) by the end of the summer.
The government, in this case, needs to keep out. If you freeze the gas prices, you still have the demand, and you have to fill in the gap with money from the US government. That money has to come from somewhere, and while I hope that we quit borrowing money from China to pay for every little thing, I also hope we don't get taxed on some ridiculous not-even-connected aspect of life in order to subsidize people's driving habits.