Notice-and-comment rulemaking is often held out as the purest example of participatory democracy in actual American governance. K.C. Davis called notice-and-comment rulemaking the “most democratic of procedures” because all may participate. Regulators are required to accept comments from any interested person and consider and respond to them before making a final decision. Direct public engagement has been seen as an antidote to the democracy deficit that plagues policymaking by unelected bureaucrats. Central to this conception is a belief that the comment process will involve a meaningful exchange of views. In the words of the DC Circuit, notice and comment involves “an exchange of views, information, and criticism between interested perso...