The 2020 election is proving to be extremely competitive up and down the ballot. In Iowa, the president is holding a narrow lead over Democratic nominee Joe Biden, while GOP senator Joni Ernst is also in a tight race to hold a seat that could determine which party controls the Senate. And yesterday, the EPA announced it would side with corn producers in the battle for biofuel exemptions, a move that could help Republicans in the state. POLITICO’s Eric Wolff explains. Anthony Adragna is an energy reporter for POLITICO and host of POLITICO Energy. Eric Wolff is an energy reporter for POLITICO. Carlos Prieto is a Politico podcast producer. Jenny Ament is the senior producer of POLITICO audio. Irene Noguchi is the executive producer of POLITICO audio.