Reuters: The U.S. government should set the ethanol-to-gasoline blend rate above the current 10 percent to ensure federal targets for using the renewable fuel are met, industry leaders said on Tuesday. They said a blend rate of 15 percent or 20 percent may be more appropriate. Jeff Broin of POET, the largest U.S. ethanol maker, said a newly formed trade group, Growth Energy, would work with the Environmental Protection Agency on the issue. Asked if the Obama administration would support …