On Thursday, the EPA proposed a new rule giving oil refiners more time to meet renewable fuels blending requirements for 2020 and 2021. The agency signaled that the plan is designed to reduce uncertainty around the future of the Renewable Fuel Standard. But, biofuel advocates are not too pleased. POLITICO\u2019s Kelsey Tamborrino explains the Biden administration\u2019s latest move and the politics behind it.