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".
James Clark McReynolds James Clark McReynolds (February 3, 1862 – August 24, 1946) was an American lawyer and judge who served as United States Attorney General under President Woodrow Wilson and as an Associate Justice of the United States Supreme Court. He served on the Court from October 12, 1914 to his retirement on January 31, 1941, during the presidencies of Woodrow Wilson, Warren Harding, Calvin Coolidge, Herbert Hoover and Franklin Delano Roosevelt. He was best known for his sustained opposition to the actions by Roosevelt and his overt anti-semitism. In his twenty-six years on the bench, McReynolds wrote more than 506 majority opinions for the court and 157 dissents, 93 of which were against the New Deal. He was one of the "Four Horsemen" (together with Willis Van Devanter, George Sutherland, and Pierce Butler), who represented the opposition to Roosevelt's New Deal.