William J. Haun


William J. Haun is a lawyer in the Washington, D.C. office of Shearman & Sterling LLP, where his practice focuses on antitrust and complex trial and appellate litigation.  Mr. Haun held clerkships with Judge Janice Rogers Brown of the U.S. Court of Appeals for the D.C. Circuit and Judge Claude M. Hilton of the U.S. District Court for the Eastern District of Virginia.  In private practice at Hunton & Williams LLP, Mr. Haun represented prominent clients--including elected officials, business leaders, and constitutional law scholars--in respective amicus efforts before the U.S. Supreme Court in Robert F. McDonnell v. United States (a major challenge to federal public corruption laws) and Zubik (Little Sisters of the Poor) v. Burwell (a religious liberty challenge to the HHS mandate under the Affordable Care Act).  Mr. Haun also successfully represented business clients in complex litigation matters crossing multiple federal and state courts, as well as in state, federal, and international government investigations. His writings on administrative and constitutional law include a book chapter, white papers, and articles in Forbes, National Affairs, National Review Online, Law & Liberty, Public Discourse, and law reviews.