When Senator Theodore Bilbo of Mississippi was campaigning for the Greater Liberia Bill of 1939, which asked the United States federal government to provide federal funding for sending African Americans to Liberia, Cox helped him in securing the support of the remaining Garveyites and the Peace Movement of Ethiopia. Cox even had a role in inspiring Bilbo to take on the project, as he had sent him a copy of his book which Bilbo read with pleasure, requesting from Cox copies of his newer writings. Cox also served as an important adviser to Bilbo, cautioning him to tone down his otherwise often inflammatory speech style and to address his Black allies with some degree of respect.Michael W. Fitzgerald. "We Have Found a Moses": Theodore Bilbo, Black Nationalism, and the Greater Liberia Bill of 1939. The Journal of Southern History, Vol. 63, No. 2 (May 1997), pp. 293–1320.Brenda Gayle Plummer, Rising Wind: Black Americans and U.S. Foreign Affairs, 1935–11960, Chapel Hill, North Carolina: University of North Carolina Press, 1996, p. 108.
