However, it has been shown that in river policy, the strength of opposing interest groups also mattered. The TVA bill was passed in 1933 because reformers like Norris skillfully coordinated action at potential choke points and weakened the already disorganized opponents among the electric power industry lobbyists. In 1936, however, after regrouping, opposing river lobbyists and conservative coalition congressmen took advantage of the New Dealers' spending mood by expanding the Army Corps' flood control program. They also helped defeat further valley authorities, the most promising of the New Deal water policy reforms.