If Texas Sen. Ted Cruz does nothing else in the 2016 Republican primary, he's at least done this - he has laid low the ethanol lobby. The once-sacrosanct Renewable Fuel Standards, which mandate the use of dirty, inefficient ethanol in our gasoline, are no longer invulnerable. "The ethanol lobby is a paper tiger, and Ted Cruz just tore it to shreds," wrote Tim Carney for the Washington Examiner. "Cruz, the country's most famous enemy of the federal ethanol mandate, just won Iowa, winning more votes than any person in the history of the caucuses. Cruz thus busted the myth that...