The Supreme Court's controversial 1984 decision in Chevron v. Natural Resources Defense Council requires federal judges to defer to administrative agencies' interpretations of federal laws that the latter administer, so long as Congress has not clearly addressed the issue in question, and the agency's view is "reasonable." Many conservatives and libertarians have long sought to overturn Chevron, and some hope that doing so will seriously constrain the administrative state. By contrast, defenders of Chevron (many of them on the political left) fear that overruling it would greatly hamper regulatory agencies, and prevent them from using their expertise effectively.
