Radio Iowa: Ethanol industry leaders say there will be price, storage and political ramifications if President Donald Trump fails to act within the next two weeks and force oil refineries to blend more ethanol into gasoline. Kelly Nieuwenhuis is president of the board for the Siouxland Energy plant in Sioux Center that has temporarily shut down. Nieuwenhuis said Thursday that Trump’s “political future” in Iowa rides on addressing the ethanol waivers granted to oil refineries.