Iowa is the the ethanol capital of America. Every politician seeking the Presidency pays homage to the Iowa caucuses and promises to maintain all the government subsidies and tariffs that keep this greenie boondoggle alive. Palin could schedule an appearance in Iowa and tell the truth. It is a boondoggle.
If she made that case and lost the Iowa caucuses, the electorate would recognize that she lost because she told the truth. It would diminish the impact of losing and make the winners look bought.
Just my thoughts.