Sarah Harris has been the lead briefwriter in numerous cases before the Supreme Court of the United States, federal courts of appeals, and state supreme courts. In addition to her appellate practice, Ms. Harris advises clients on complex administrative-law issues and provides strategic advice regarding trial strategy. Her practice encompasses a wide range of subjects, including constitutional law, class actions, antitrust, False Claims Act litigation, products liability, and federal civil procedure. Ms. Harris also maintains an active pro bono practice. She has successfully argued a First Amendment case before the Sixth Circuit and obtained a new trial for a client in a criminal case before the Maryland Court of Appeals.

Ms. Harris served as a law clerk to Justice Clarence Thomas in the Supreme Court of the United States, the Honorable Laurence H. Silberman in the US Court of Appeals for the District of Columbia Circuit, and the Honorable Sandra L. Lynch in the US Court of Appeals for the First Circuit. Ms. Harris is a magna cum laude graduate of Harvard Law School, where she served on the board of the Harvard Federalist Society.


  • Tarrant Regional Water Dist. v. Herrmann, 569 U.S. ___ (2013). Represented respondents in a water rights dispute between Oklahoma and Texas over the Red River Compact, in which the Supreme Court ruled unanimously in favor of respondents and held that Oklahoma's water statutes do not violate either the Compact or the dormant Commerce Clause.
  • Maryland v. King, 569 U.S. ___ (2013). Represented amicus National Association of Criminal Defense Lawyers regarding doctrinal and historically grounded limitations on warrantless, suspicionless searches under the Fourth Amendment.


Preparing for a New Administration: What Should Endowments Expect?
8:00 am–4:00 pm ET
Arnold & Porter Kaye Scholer
601 Massachusetts Ave, NW
Washington, DC 20001
The CIA and the Congress for Cultural Freedom in the Early Cold War: The Limits of Making Common Cause
Reviewing Regulatory Review (pdf)
National Affairs


Washington, DC Super Lawyers
"Rising Star" for Appellate (2014 and 2015)


  • JD, Harvard Law School, 2009, magna cum laude
  • PhD, University of Cambridge, 2014
  • MPhil, University of Cambridge, 2004
  • AB, Princeton University, 2003, summa cum laude
  • District of Columbia
  • Supreme Court of the United States, The Honorable Clarence Thomas
  • United States Court of Appeals, District of Columbia Circuit, The Honorable Laurence H. Silberman
  • United States Court of Appeals, First Circuit, The Honorable Sandra L. Lynch

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