When Catt again became president in 1915, the NAWSA adopted her plan to centralize the organization, and work toward the suffrage amendment as its primary goal. This was done despite opposition from Southern members who believed that a federal amendment would erode states' rights. With its large membership and the increasing number of women voters in states where suffrage had already been achieved, the NAWSA began to operate more as a political pressure group than an educational group. It won additional sympathy for the suffrage cause by actively cooperating with the war effort during World War I. On February 14, 1920, several months prior to the ratification of the Nineteenth Amendment, the NAWSA transformed itself into the League of Women Voters, which is still active.