Legislation and the Regulatory State provides an accessible, up-to-date introduction to the institutions and procedures of the modern regulatory state. Designed to emphasize regulatory policymaking and the practical aspects of administrative lawyering, the casebook explores Congress's reasons for regulating and the choices it makes when enacting legislation, the legislative process and tools of statutory interpretation, administrative agencies' position within the Constitution's system of separated powers, the Administrative Procedure Act, and judicial review of agency action.

The fourth edition has been completely revised to account for the Supreme Court's rollback of Chevron deference in Loper Bright Enterprises v. Raimondo and the rise of "major questions" doctrine. It includes the Supreme Court's decisions in SEC v. Jarkesy and Trump v. CASA, Inc. and covers recent developments in appropriations, congressional oversight, the appointment and removal of administrative officers, and Article III standing.