In this article http://www.reuters.com/article/us-usa-trump-renewables-idUSKBN1671PD it seems that the Trump administration has reached a deal to take some of the mandates on refiners off in exchange for the ability to run higher ethanol in the summer and incentives to run blends rather than a mandated blend.

The effects of this change are not certain. No certain language or vehicle for changing the rule has been set out yet but the Renewable Fuels Association executive director has stated that the deal is non-negotiable. This could effect both corn prices and cottonseed prices if less ethanol is blended. Time will tell

DF