Pro's Ben Lefebvre was in the courtroom for oral arguments on whether the US Forest Service can approve a natural gas pipeline that would run underneath a portion of the Appalachian Trail. Plus, Bernie Sanders wins the endorsement of a union representing some EPA workers, and JP Morgan announces new climate plans. Kelsey Tamborrino is a Politico Energy reporter. Irene Noguchi is the executive producer of Politico's audio department. Jenny Ament is the senior producer of Politico's audio department. Carlos Prieto is a Politico podcast producer. Jeremy Siegel is a host and producer for Politico's audio department.