Complex sentence: Active in the Republican Party, she was president of the Women's Republican League during Warren G. Harding's 1920 presidential campaign and the first election in which all American women were given the right to vote.
Split into simpler sentences: Active in the Republican Party, she was president of the Women's Republican League during Warren G. Harding's 1920 presidential campaign. This was the first election in which all American women were given the right to vote.