When was the first year that women in the United States were able to vote on presidential elections?
user
Good question!  We would need to ask some other people, but I can tell you that in 1920 women in all US states could vote for president.
assistant
When was the first year that women in the United States were able to vote on presidential elections?
user
2002, with the case of Buchanan v. Manson.
assistant
When was the first year that women in the United States were able to vote on presidential elections?