Erik Jaffe has been involved in appeals on a broad range of legal issues, including First Amendment challenges to campaign finance reform, Commerce Clause challenges to Health Care Reform and other federal legislation, Equal Protection Clause challenges to affirmative action in education, First Amendment challenges to school vouchers, Fifth Amendment challenges to takings of property, Second Amendment challenges to restrictions on gun ownership, and a wide variety of cases involving patents, copyrights, ERISA, securities fraud, federal preemption, environmental regulation, and other state and federal constitutional and statutory matters. He has represented businesses and non-profit groups, Judges, Senators, former government officials, Nobel Prize winners, and a broad cross-section of private individuals. Mr. Jaffe has been involved in over 100 Supreme Court matters, including filing 30 cert. petitions, representing half-a-dozen parties on the merits, and filing over 60 amicus briefs at both the cert. and merits stages.

A 1990 graduate of the Columbia University School of Law, Mr. Jaffe was a law clerk to Judge Douglas H. Ginsburg of the United States Court of Appeals for the District of Columbia Circuit from 1990 to 1991. Following that clerkship he spent five years in litigation practice with the Washington, D.C. law firm of Williams & Connolly. In the summer of 1996 he left Williams & Connolly to clerk for Supreme Court Justice Clarence Thomas. At the end of that clerkship he started his own practice, and he was a sole practitioner from 1997 to 2018. He joined the firm in 2018.