Which future president graduated 64th of 112 in his 1935 prep school class but was voted "most likely to succeed"?

A 1972 law made the third Sunday in June a permanent national observance; which one? Which Washington, D.C., university, founded in 1867, didn't have its first Black president until 1926? Which president, badly defeated in 1932, later led two commissions to reorganize the executive branch? Which slugger, nicknamed "Mr. October," holds the major league career record for strikeouts by a batter, with 2,597? Who lost the popular vote to Grover Cleveland in 1888 but won the electoral vote, 233 to 168? Who made no campaign speeches yet won the 1868 presidential election by a wide electoral margin? Who won the most popular and electoral votes in 1824, yet saw the House choose John Quincy Adams as president? Which folk artist, her hands crippled by arthritis, began painting seriously in her late 70s?