Since the day after inauguration, Democrats have controlled the agenda at the Federal Energy Regulatory Commission. But GOP still holds three of the five commission seats, and Republican Neil Chatterjee has emerged as the swing vote, at least for the next 3 months. And on Thursday, he voted alongside Democrats on a rule that could shape the future of interstate pipelines across America. 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.