Evan L. Schwab  served as law clerk to a US Supreme Court Justice that was nominated by which president?
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".
Charles V. Bush Charles Vernon Bush (December 17, 1939 – November 5, 2012) was an American civil rights activist, retired senior corporate executive and former U.S. Air Force officer. In 1954, Bush was selected by Chief Justice Earl Warren for appointment as the first African-American page of the Supreme Court of the United States. He was also one of the first three African-American Cadets to attend the U.S. Air Force Academy and the first African American to graduate from there.