Nathan Lewin is a prominent American attorney specializing in appellate litigation, with a focus on national security, civil liberties, and cases involving Israel and Jewish interests. He founded the law firm Lewin & Lewin, P.C., in Washington, D.C., and has represented major clients such as the American Israel Public Affairs Committee (AIPAC), the Zionist Organization of America, and individuals in high-profile terrorism-related prosecutions. Lewin has argued over 20 cases before the U.S. Supreme Court, including challenges to government surveillance and defenses of free speech rights for pro-Israel advocates. His career, spanning more than five decades, has positioned him as a key figure in influence networks connecting legal, political, and advocacy spheres in Washington.