In 1918 Harrison briefly served as an organizer for the American Federation of Labor (AFL). He chaired the Negro-American Liberty Congress (co-headed by William Monroe Trotter.) The latter was the major wartime protest effort of African Americans. The Liberty Congress pushed demands against discrimination and racial segregation in the United States. It submitted a petition to the U. S. Congress for federal anti-lynching legislation, which the NAACP did not demand at that time. Harrison commented on domestic and international aspects of the war, writing: "During the war the idea of democracy was widely advertised, especially in the English-speaking world, mainly as a convenient camouflage behind which competing imperialists masked their sordid aims... those who so loudly proclaimed and formulated the new democratic demands never had the slightest intention of extending the limits or the applications of 'democracy.'"