For years, Democrats have discussed establishing a federally mandated clean energy standard to transition away from high emitting sources of power. But some environmental groups are criticizing the policy before details have even been released. Today, POLITICO Magazine senior writer Michael Grunwald explains what’s at the heart of this criticism.  Anthony Adragna is an energy reporter for POLITICO. Michael Grunwald is a senior writer for POLITICO Magazine. 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.