Question: Evan L. Schwab  served as law clerk to a US Supreme Court Justice that was nominated by which president?

full_context: Document 1: William O. Douglas: William Orville Douglas (October 16, 1898January 19, 1980) was an American jurist and politician who served as an Associate Justice of the Supreme Court of the United States. Nominated by President Franklin D. Roosevelt, Douglas was confirmed at the age of 40, one of the youngest justices appointed to the court. His term, lasting 36 years and 211 days (1939–75), is the longest in the history of the Supreme Court. In 1975 "Time" magazine called Douglas "the most doctrinaire and committed civil libertarian ever to sit on the court".
Document 2: Evan L. Schwab: Evan L. Schwab is an American attorney who served as law clerk to Justice William O. Douglas of the Supreme Court of the United States during the 1963 Term.
Document 3: Loftus Becker: Loftus E. Becker Jr. is a law professor at the University of Connecticut School of Law, where he teaches criminal law, constitutional law, and a seminar on the Supreme Court. In 1965, he graduated from Harvard College, and in 1969 from the University of Pennsylvania School of Law, where he served as editor-in-chief of the "University of Pennsylvania Law Review". After graduating from law school, he was a law clerk for Chief Judge David L. Bazelon of the U.S. Court of Appeals for the District of Columbia Circuit, and Justice William J. Brennan, Jr., of the Supreme Court of the United States. He taught at the University of Minnesota Law School from. 1971 to 1977.
Document 4: David Skover: David Michael Skover is the Fredric C. Tausend Professor of Law at the Seattle University School of Law. He teaches, writes, and lectures in the fields of federal constitutional law, federal courts, free speech & the internet, and mass communications theory. He is also a regionally acclaimed opera and musical theater singer. David graduated from the Woodrow Wilson School of International and Domestic Affairs at Princeton University. He received his law degree from Yale Law School, where he was an editor of the Yale Law Journal. Thereafter, he served as a law clerk for federal judge Jon O. Newman of the U.S. Court of Appeals for the Second Circuit.
Document 5: Rehnquist Court: The Rehnquist Court refers to the Supreme Court of the United States from 1986 to 2005, when William Rehnquist served as Chief Justice of the United States. Rehnquist succeeded Warren Burger as Chief Justice after the latter's retirement, and Rehnquist served as Chief Justice until his death in 2005, at which point John Roberts was nominated and confirmed as Rehnquist's replacement. The Rehnquist Court is generally considered to be more conservative than the preceding Burger Court and Warren Court. According to Jeffrey Rosen, Rehnquist combined an amiable nature with great organizational skill, and he "led a Court that put the brakes on some of the excesses of the Earl Warren era while keeping pace with the sentiments of a majority of the country." Biographer John Jenkins argued that Rehnquist politicized the Supreme Court and moved the court and the country to the right. Through its rulings, the Rehnquist Court often promoted a policy of New Federalism in which more power was given to the states at the expense of the federal government. The Rehnquist Court was also notable for its stability, as the same nine justices served together from 1994 to 2005, the longest such stretch in Supreme Court history.
Document 6: Ruth Bader Ginsburg: Ruth Bader Ginsburg (born Joan Ruth Bader; March 15, 1933) is an Associate Justice of the Supreme Court of the United States. Ginsburg was appointed by President Bill Clinton and took the oath of office on August 10, 1993. She is the second female justice to be confirmed to the Court (after Sandra Day O'Connor), and one of four female justices to be confirmed (with Sonia Sotomayor and Elena Kagan, who are still serving). Following Justice O'Connor's retirement, and prior to Justice Sotomayor joining the Court, Ginsburg was the only female justice on the Supreme Court. During that time, Ginsburg became more forceful with her dissents, noted by legal observers and in popular culture. She is generally viewed as belonging to the liberal wing of the Court. Notable majority opinions Ginsburg has authored include "United States v. Virginia, Olmstead v. L.C.," and "Friends of the Earth Inc. v. Laidlaw Environmental Services, Inc."
Document 7: Stephen M. Schwebel: Stephen Myron Schwebel (born March 10, 1929), is an American jurist, counsel and independent arbitrator. He serves as President of the World Bank Administrative Tribunal and as a member of the U.S. national group at the Permanent Court of Arbitration. Previously, he served as President of the International Monetary Fund Administrative Tribunal (1994–2010), as President of the International Court of Justice (1997–2000), as Vice President of the International Court of Justice (1994–1997) and as Judge of the International Court of Justice (1981–2000). Prior to his tenure on the World Court, Judge Schwebel served as Deputy Legal Adviser to the U.S. Department of State (1974–1981) and as Assistant Legal Adviser to the U.S. Dept. of State (1961–1967). He has also served as a professor of law at Harvard Law School (1959–1961) and Johns Hopkins University (1967–1981). Judge Schwebel is noted for his expansive opinions in momentous cases such as "Legality of the Threat or Use of Nuclear Weapons", " Military and Paramilitary Activities in and Against Nicaragua" and " Oil Platforms (Islamic Republic of Iran v. United States of America)".
Document 8: Closed Chambers: Closed Chambers: The Rise, Fall, and Future of the Modern Supreme Court is a 1998 book by Edward Lazarus, who served as a law clerk for U.S. Supreme Court Justice Harry Blackmun during the October Term 1988. Lazarus combines his reflections as a clerk with a substantial body of research to describe the collapse in comity between Justices - and particularly clerks - at the Supreme Court. The book is noted both for its extraordinary inside access to internal Supreme Court deliberation and its arguably balanced account of the controversy surrounding many high-profile Supreme Court decisions on the death penalty, civil rights, and abortion.
Document 9: Stephen Breyer: Stephen Gerald Breyer ( ; born August 15, 1938) is an American lawyer, professor, and jurist who serves as an Associate Justice of the Supreme Court of the United States. Appointed by President Bill Clinton in 1994, Breyer is generally associated with the more liberal side of the Court.
Document 10: Lawrence G. Wallace: Lawrence G. Wallace (born 1930) is former Deputy United States Solicitor General who argued 157 times before the United States Supreme Court, more than any other career civil servant. Wallace received A.B. and M.P.A. degrees from Syracuse University in 1952 and 1954, respectively, and an LL.B. from Columbia University School of Law in 1959, where he was Editor-in-Chief of the "Columbia Law Review". After practicing law for a year with the Washington, D.C. firm of Covington & Burling, he served as a law clerk to Justice Hugo Black of the United States Supreme Court. After completing his clerkship in 1961, he jointed the faculty of the Duke University Law School, where he remained until joining the office of the United States Solicitor General in January 1968. Wallace was promoted to Deputy Solicitor General in 1970 and retired from the Solicitor General's office in 2003.
Document 11: David Souter: David Hackett Souter ( ; born September 17, 1939) is a retired Associate Justice of the Supreme Court of the United States. He served from October 1990 until his retirement in June 2009. Appointed by President George H. W. Bush to fill the seat vacated by William J. Brennan, Jr., Souter sat on both the Rehnquist and Roberts courts and came to vote reliably with the court's liberal members.
Document 12: Thurgood Marshall: Thurgood Marshall (July 2, 1908January 24, 1993) was an Associate Justice of the Supreme Court of the United States, serving from October 1967 until October 1991. Marshall was the Court's 96th justice and its first African-American justice. Prior to his judicial service, he successfully argued several cases before the Supreme Court, including "Brown v. Board of Education".
Document 13: William T. Dzurilla: William T. Dzurilla, formerly William T. D'Zurilla, is an attorney, a partner in the Boies, Schiller & Flexner law firm's Fort Lauderdale, Florida office. He was a law clerk for Justice Byron White of the United States Supreme Court from 1982 to 1983. He played a key role in the privatization of major state-owned businesses in Slovakia.
Document 14: Oliver Wendell Holmes Jr.: Oliver Wendell Holmes Jr. ( ; March 8, 1841 – March 6, 1935) was an American jurist who served as an Associate Justice of the Supreme Court of the United States from 1902 to 1932, and as Acting Chief Justice of the United States from January–February 1930. Noted for his long service, his concise and pithy opinions and his deference to the decisions of elected legislatures, he is one of the most widely cited United States Supreme Court justices in history, particularly for his "clear and present danger" opinion for a unanimous Court in the 1919 case of "Schenck v. United States", and is one of the most influential American common law judges, honored during his lifetime in Great Britain as well as the United States. Holmes retired from the Court at the age of 90 years, making him the oldest Justice in the Supreme Court's history. He also served as an Associate Justice and as Chief Justice on the Massachusetts Supreme Judicial Court, and was Weld Professor of Law at the Harvard Law School, of which he was an alumnus.
Document 15: Vinson Court: The Vinson Court refers to the Supreme Court of the United States from 1946 to 1953, when Fred Vinson served as Chief Justice of the United States. Vinson succeeded Harlan F. Stone as Chief Justice after the latter's death, and Vinson served as Chief Justice until his death, at which point Earl Warren was nominated and confirmed as Stone's replacement. The court presided over the country during the start of the Cold War and the Korean War. The court's decisions reflected the continuing ideological battle between the judicial restraint of Justice Felix Frankfurter and the civil rights activism of Justices William O. Douglas and Hugo Black. Frankfurter's more conservative views prevailed during the Vinson Court, but many of the dissents written during the Vinson Court would lay the groundwork for the major rulings during the succeeding Warren Court.
ground_truth: Franklin D. Roosevelt