There are wonderful resources available about the role of women in U.S. history. Below is a small sampling of online resources:
Women's History in America presented by Women's International Center (includes sections on Early Attitudes Toward Women; The Weaker Sex?; The Legal Status of Women; Women at Work; Women in Politics; Feminist Philosophies; Women in Reform Movements; and Fighting for the Vote.
Women's History Month by History.com (includes sections on The History of Women's Suffrage; Featured Videos; Women's Hall of Fame; Timeline; Firsts In Women's Achievement; Did You Know?; and Resources.
Resources Center of the National Women's History Project.
Women Presidential Candidates - United States: Women Who Have Run for United States President (1872 to today) By Jone Johnson Lewis, About.com (U.S.)
The Women Who Ran for President by Jo Freeman (U.S)
WOMEN PRESIDENTIAL AND VICE PRESIDENTIAL CANDIDATES: A Selected List from Center for American Women and Politics (this is a .pdf file) (U.S).
WORLDWIDE GUIDE TO WOMEN IN LEADERSHIP (world)
“I am a feminist, and what that means to me is much the same as the meaning of the fact that I am Black: it means that I must undertake to love myself and to respect myself as though my very life depends upon self-love and self-respect” - Unknown