Dan Farber is the Sho Sato Professor of Law at the University of California, Berkeley. He is also the Faculty Director of the Center for Law, Energy, and the Environment. Professor Farber is a member of the American Academy of Arts and Sciences and a Life Member of the American Law Institute. He is the author of Contested Ground: How to Understand the Limits on Presidential Power (UC Press 2021); Research Handbook on Public Choice and Public Law (Elgar 2010) (with A. O'Connell); Judgment Calls: Politics and Principle in Constitutional Law (Oxford University Press 2008) (with S. Sherry); Retained by the People: The "Silent" Ninth Amendment and the Rights Americans Don't Know They Have (Basic Books 2007); Lincoln's Constitution (University of Chicago Press 2003); and Eco-Pragmatism: How to Make Sensible Environmental Decisions in an Uncertain World (University of Chicago Press 1999). You can follow him on Twitter at @dfarber.
The history isn’t unambiguous, but it leans toward expanding impeachment beyond criminal offenses.