With gasoline averaging about $4.50 per gallon—over six bucks if you're unlucky enough to live in California—President Donald Trump proposes a gas tax holiday to give American consumers a bit of relief. A reprieve from taxes is always welcome, but the real bite isn't the federal 18.4 cents per gallon of gasoline and 24.4 cents on each gallon of diesel fuel. States charge far more, and that's especially true if you rent a car, with gas taxes the least of the problem. In some places, more than half the tab for car rentals comes from taxes and government-mandated fees.
