Ethanol is already in the tank of your motor vehicle today. It has been and will be tomorrow. Since the market is forcing you to buy it, why not buy American?
China is playing the corn/ethanol game. They've banked hard on it going all the way to 2025. Looks like POTUS is trying to pull the rug from under their feet. Keep them bouncing on thier toes. Keep them scrambling. Get them sureing up holes in the dam while at the same time wondering where the next punch is going to come from. Corn/Ehtanol is just the newest poke the USA is giving to China.
In the grand scheme of things, it won't matter. For those concerned, an Ethanol free USA is not far off. This is just a move to address today and yesterday's messes. Do anons really think the United States Space Force is going to be cruising the stars in ethanol fueled rockets?
http://www.greencarcongress.com/2018/02/20180218-chinae10.html
https://www.reuters.com/article/us-china-biofuels-teapots/chinas-independent-oil-refiners-gear-up-for-ethanol-push-in-cars-idUSKBN1GW14R