At the AFL's annual convention in 1934, Lewis gained an endorsement from them of the principle of industrial unionism, as opposed to limitations to skilled workers. His goal was to unionize 400,000 steel workers, using his UMWA resources (augmented by leftists he had expelled in 1928). With the leaders of nine other large industrial unions and the UMWA in November 1935, Lewis formed the "Committee for Industrial Organization" to promote the organization of workers on an industry-wide basis. Key allies were Philip Murray (the UMWA man Lewis picked to head the steel union); Sidney Hillman, president of the Amalgamated Clothing Workers of America (ACWA); and David Dubinsky of the International Ladies' Garment Workers' Union (ILGWU).