Decades before Barack Obama or Hillary Clinton, there was Shirley Chisholm. As the first black woman to run for president for a major political party, she was years ahead of her time. So why don't more people know about her?
Barack Obama Officially Endorses Hillary Clinton for President
Barack Obama endorsed his former rival Hillary Clinton for U.S. president at the Democratic National Convention in Philadelphia on Wednesday. MORE: Hillary Clinton Becomes First Woman Nominee of Major U.S. Political Party