There’s a major controversy brewing over a Trump administration proposal to prop up coal and nuclear in the electricity sector, and it’s up to an independent regulatory agency that doesn’t normally find itself in the spotlight to decide what will happen. A few weeks ago, Energy Secretary Rick Perry took the unusual step of directing the Federal Energy Regulatory Commission (FERC) to design a rule that allows plants that have fuels stockpiled for 90 days to recover its costs—and this would apply only to coal and nuclear.