Politics of Ethanol The Des Moines Register chides President Obama for visiting Iowa and highlighting his differences with Republican rival Mitt Romney over wind energy subsidies but saying nary a word about the larger controversy in the state: corn ethanol and the drought. His agriculture secretary, Tom Vilsack, made clear that he opposed an ethanol mandate waiver as it would hurt investor sentiment. This could eventually become another Shirley Sherrod moment for the farm chief. It is a political tightrope walk between grain farmers and food consumers, but it is a political absolute for livestock producers. The Kansas City Federal Reserve Bank notes that livestock producers are currently being hurt the worst. Producers on both sides o...