U.S. lawmakers urge EPA to reject exempting refiners from biofuel mandates The letter comes after a report from Reuters last week that said President Joe Biden's administration, under pressure from labor unions and U.S. senators, including from his home state of Delaware, is considering ways to provide relief to U.S. oil refiners from the mandates. Written By: Stephanie Kelly / Reuters | 4:54 pm, Jun. 16, 2021 × Choices at the gas pump including ethanol or no ethanol gas are seen in Des Moines, Iowa, U.S., January 29, 2020. REUTERS/Brian Snyder/File Photo/File Photo NEW YORK, June 16 (Reuters) - Democratic U.S. congressional members sent a letter on Wednesday to the Environmental Protection Agency, urging it to reject any action that would exempt oil refiners from obligations to blend biofuels into the nation's fuel mix.