What we SHOULD be doing is to move the ethanol crop production to the south. Use sugar cane instead of corn, though. It's a MUCH more efficient crop for this purpose than is corn...
Think about it. The 'combine' cuts the cane & squeezes the sap out - it is pumped to a tank on the machine. Periodically, it gets transferred to a tanker. The left-over cane residue stays in the field, & eventually gets plowed under (& serves as compost)
The tanker moves the sap to the processing plant, where it's fermented & distilled. Since the sap is nearly 100 percent sugar water, the fermentation is fast and just about 100 percent efficient. Corn, on the other hand, has to be ground up into meal, mixed with water (mashed) to release the starches, (cooked?) and then those starches have to be broken down into sugars before the fermentation can really begin to make ethanol. And then, you have to haul away the residue (the leftover fiber from the corn meal) and handle the corn oil byproduct.
Brazil has been using sugar cane for ethanol for many years, and has worked out the bugs in the process already.
The farmers in the midwest can sell their crops for food instead of fuel. PLUS, we'll add a NEW cash crop.
Sugar cane & sorghum can be grown fairly far north in the US. My uncle grows sorghum cane (for molasses) in central Ohio.