text:  A 6-3 opinion, and it looks like there's going to be a serious clawback of that federal agency power, if not completely overturning this earlier case, Chevron, from 1984 that gave them so much power. It says, we have given the required courts, we've had them defer to permissible agency interpretations, even when a reviewing court reads the statute differently. In this case, as we consider whether that doctrine should be overruled, and it sounds like they are going that step. How far they've gone with overruling Chevron.