David K. Niles (November 23, 1888 – September 28, 1952; Boston, Massachusetts) was an American political advisor who worked in the White House from 1942 to 1951 for the administrations of Franklin Roosevelt and Harry Truman. Niles was one of only two Roosevelt aides retained by Truman upon his assumption of the presidency. Childhood Born in Boston's North End and raised in Boston's South End, Niles was the eldest of seven children, six of whom survived to adulthood. His parents were Ashkenazi Jewish immigrants from the Russian Empire, Asher K. Neyhus and Sophie Berlin (Berlinski). He and his father kept the middle initial "K" to honor their heritage as kohanim. His father worked as a tailor to support the family. While in attendance at Brimmer Grammar School, Niles became acquainted with author Edward Everett Hale, who became a mentor to Niles as he "supplied the boy with reading material and urged him in his ambition to acquire knowledge". Entry into politics While in high school, he Anglicized his surname Neyhus to Niles, reportedly inspired by his classmate, figure skater Nathaniel Niles. He graduated from the prestigious Boston Latin School in 1906, but went to work at a department store to support his family. Through attending lectures at Boston's Ford Hall Forum, he caught the eye of its head, Republican George W. Coleman, who took the young Niles under his wing. During World War I, Coleman took Niles with him to Washington, D.C. to work in the US Department of Labor's Information Office. Upon his return to Boston post-war, Coleman promoted Niles to the position of assistant director of the Ford Hall Forum, where he would later himself become director (1921–1952). Through his position at the Ford Hall Forum, Niles was asked by Wisconsin Senator Robert La Follette and Montana Senator Burton Wheeler to aid their bid for presidency and vice presidency of the United States with the Progressive Party in 1924. He headed the speakers' bureau, and though the campaign failed abysmally, he was able to gain political insight from the experience. In the aftermath of the La Follette presidential campaign, he attracted the attention of Harvard lawyer Felix Frankfurter, who was then defense counsel for the Sacco-Vanzetti trial, and the two began to work together, forming a lifelong friendship. Roosevelt Administration Through his work on the presidential campaign of New York Governor Al Smith in 1928, Niles met Harry