Carrie Chapman Catt was an American suffragist who was a leader in the women's suffrage movement. She was president of the National American Woman Suffrage Association and founded the League of Women Voters. Catt is best known for her work in organizing the successful campaign to pass the Nineteenth Amendment to the United States Constitution, which granted women the right to vote. Catt's initials, CATT, are often used as an acronym for her work in the suffrage movement.