Retailer interest in E15 has increased in the past few months, based in part on the belief that last fall, at an event in Council Bluffs, Iowa, President Trump “signed something” making it legal to sell E15 year-round. That’s not quite what happened, but the President said it would be done before the summer Reid vapor pressure (RVP) season begins on June 1, and the process is underway so we’re hopeful…