Ron paul has put forth legislation that would eliminate the gas tax all together. McCains tax cut turns into a tax hike 3 months later. It is flawed.
Quote from kinggyppo:
McCain who I am not really a fan of was the first politician I have ever heard bring up the idea that the taxes on gas could be lowered (never going to happen).
http://www.americanprogressaction.org/issues/2007/house_oil_contributions_all.html