Nathan Lewin has engaged in trial and appellate litigation in federal and state courts for 40 years. While he was an Assistant to the Solicitor General in the Department of Justice under Solicitors General Archibald Cox and Thurgood Marshall, he argued 12 cases before the Supreme Court for the United States. Since entering private practice he has argued in the Supreme Court another 15 times, for a total of 27 arguments in the Supreme Court. His Supreme Court cases have included the representation of banks and other commercial interests as well as criminal cases and issues of constitutional law. Mr. Lewin was law clerk to Chief Judge J. Edward Lumbard of the United States Court of Appeals for the Second Circuit (1960-1961) and to Associate Justice John M. Harlan of the Supreme Court of the United States (1961-1962). Mr. Lewin also served as Deputy Assistant Attorney General in the Civil Rights Division of the Department of Justice, and before that as Deputy Administrator of the Bureau of Security and Consular Affairs at the Department of State. On leaving government service, Mr. Lewin was a founding partner of Miller Cassidy Larroca and Lewin, which was one of the nation's foremost litigation "boutiques" for more than thirty years.