In 1917, Jeannette Rankin, a Montana Republican, became the first woman to serve in the House. Committed to her pacifist beliefs, she was the only member of Congress to vote against entry into both World War I and World War II.
Shortly after Ms. Rankin's election to Congress, the 19th Amendment was passed in 1919. This means that the first woman was elected to Congress before the right to vote was even given to women! The amendment's journey to ratification had been a long and difficult one. Starting in 1896, the Republican Party became the first major party to officially favor women's suffrage. That year, Republican Sen. A. A. Sargent of California introduced a proposal in the Senate to give women the right to vote. The proposal was defeated four times in the Democratic-controlled Senate. When the Republican Party regained control of Congress, the Equal Suffrage Amendment finally passed (304-88), over the objections of the Democrats.
When the amendment was submitted to the states, 26 of the 36 states that ratified it had Republican-controlled legislatures. Of the nine states that voted against ratification, eight were controlled by Democrats. Twelve states, all Republican, had given women full suffrage before the federal amendment was finally ratified.