To correctly answer the question all you have to consider is what makes Trump look great.
"Trump’s ethanol moves: good policy or corn country politics?" PBS NewsHour 10/10/2018
SUMMARY: At a Tuesday campaign rally in Iowa, President Trump announced plans to lift the ban on summer sales of gasoline with 15 percent ethanol, known as E15. This move is opposed by oil companies and environmental groups, but supported by the agricultural sector. John Yang speaks to Grant Gerlock from Harvest Public Media, who explains the changes and how they could impact the midterm elections.