Previous administrations—including that of President Donald Trump—have promoted domestic consumption of corn and soybeans through expanded biofuel mandates and subsidies. The original framework for this policy was the Energy Independence and Security Act of 2007, which required the production of 15 billion gallons of corn ethanol by 2022. That target has been achieved and surpassed: U.S. ethanol production reached approximately 16.9 billion gallons in 2025, accounting for roughly 10–11 percent of total gasoline consumption. Most gasoline (roughly 90–95 percent) in the United States is currently sold as a 10 percent ethanol blend (E10), which has historically functioned as a practical “blend wall” under pr...