Timothy Jost is Robert L. Willett Family Professor of Law, emeritus, at Washington and Lee University School of Law. A top expert on American health law and policy, he is a co-author of Health Law (first edition 1987), a casebook that pioneered health law as a teaching and research field in American law schools. His analysis and arguments regarding the Patient Protection and Affordable Care Act (ACA, Obamacare) have been widely quoted.