U.S. News and World Report: Even before the recession took hold, the ethanol industry was suffering. Recent months haven’t been any kinder. So industry representatives are urgently turning to the Obama administration, asking it to do something they say is critical for their survival: change the federal limit on how much ethanol can be blended into gasoline. The industry’s push to allow drivers to fill up on higher blends of ethanol has been building since late last year. It’s still largely opposed by automakers, …