Well, neither does he. But engine makes are suing his D.E.P., claiming, accurately, that the latest mandate to boost ethanol content to 15% is going to ruin cars, lawn mowers, boats, you name it. Everyone knows that the 10% mandate was a complete flop, saving no gasoline and merely increasing costs to consumers. Congress’s response? Add another $5 billion in subsidies and increase the ethanol content 50%.