"Refiner Valero's Secret Campaign Against U.S. Biofuels Mandates"

"U.S. biofuels regulations, which mandate mixing corn-based ethanol into gasoline, have lately drawn together a diverse cast of political opponents.

They include an upstart gas station owners' trade group, a former Obama administration environmental adviser and billionaire activist investor Carl Icahn, who owns a refiner and served as U.S. President Donald Trump's special advisor on business regulation - until he resigned Friday amid allegations of a conflict of interest.

Even the Renewable Fuels Association (RFA), a leading biofuels industry group, recently dropped its opposition to policy changes sought by this ad hoc coalition. "

Chris Prentice reports for Reuters August 21, 2017.