How did the nineteenth amendment affect citizenship in the united states?

It expanded the definition of citizenship to include women's right to vote.

The Nineteenth Amendment to the Constitution of the United States stipulates that all genders can vote, both male and female. It was part of the achievements of the feminist movement and other activist groups that fought against various problems. On May 21, 1919, the House of Representatives approved the amendment and two weeks later, on June 4, the Senate approved it as well.