Of course, everything Congress does is with the very best of intentions which are, in turn, beset with unintended consequences.
Based on sugar cane, Brasil has the world's largest and most technologically developed ethanol industry. They would LOVE to sell us all the ethanol we want (or Comgress can "mandate") all delivered for a price less than our present costs of production.
Further, cane ethanol burns more efficiently and does less damage to engines than our corn-based product does. And, environmentalists would be pleased when the "dead zone" in the Gulf at the mouth of the Mississippi is reduced due to a lessening of the fertilizer runoff.
Of course doing this would make too much sense (to say nothing of lower food prices in the U.S. and maybe real cane sugar in my Coca Cola). I hope for the day when the Will of the People causes Congress to gag on their contributions from "Big Agra" and "Big Sugar" and come to their senses.
I'm not holding my breath.