EXPLAINER: Why Biden is allowing more ethanol in gasoline


              President Joe Biden and Rep. Cindy Axne, D-Iowa, talk with Jack Mitchell, regional vice president of POET Bioprocessing, left, as he gives them a tour at POET Bioprocessing in Menlo, Iowa, Tuesday, April 12, 2022. (AP Photo/Carolyn Kaster)
            
              President Joe Biden and Rep. Cindy Axne, D-Iowa, talk with Jack Mitchell, regional vice president of POET Bioprocessing, left, as he gives them a tour at POET Bioprocessing in Menlo, Iowa, Tuesday, April 12, 2022. (AP Photo/Carolyn Kaster)
            President Joe Biden walks with Rachel Connor, a grain merchandiser with POET Bioprocessing, before he speaks at POET Bioprocessing in Menlo, Iowa, Tuesday, April 12, 2022. (AP Photo/Carolyn Kaster) President Joe Biden and Rep. Cindy Axne, D-Iowa, talk with Jack Mitchell, regional vice president of POET Bioprocessing, right, as he gives them a tour at POET Bioprocessing in Menlo, Iowa, Tuesday, April 12, 2022. (AP Photo/Carolyn Kaster)