The Supreme Court heard a direct challenge to a major component of federal agency law Wednesday called "Auer Deference." Auer deference says judges ought to defer to an agency’s interpretation of its own regulations....Business groups and conservative critics of the administrative state have waged a steady campaign against Auer in recent years....An agency will intentionally issue a vague regulation, construe that regulation to its own benefit, then use Auer to command judicial fealty to its decision.