This would help, though not in the context McCain or Clinton is talking about. While there are built in federal taxes, a lot of gasoline taxes at the consumer level are levied by the states and local governments for public works projects and revenue. And to make matters more complicated, sometimes the revenue from those taxes are earmarked.

The best way to bring the price of gas down is to start FIXING THE INTEREST RATE, I've been saying this time and time again. The reason our gas is so high is because our dollar is so low, and the reason it's so low is because of artificially low interest rates. Really, high gas prices are just another product of our inane monetary system.