Two years ago the Democrats in Congress and the Bush administration got together to deliver a payoff to farmers: they required refiners to use 15 billion gallons of biofuels by 2012. They did not expect that a crashing recession would lead to a reduction in the amount of gasoline the nation consumes - the first such reduction in years. And they also didn’t expect a White House to push so aggressively for higher-mileage vehicle fleets. As a result of the changed circumstance, it looks like it will be impossible for Americans to use that much ethanol. Something has to give....