Hillary Clinton served as Secretary of State under President Obama from 2009 to 2013, after being defeated by Obama for the Democratic party's nomination for President in 2008. First coming to national prominence as the wife of President Bill Clinton, she made history as the first ever First Lady to run for office, winning a U.S. Senate seat representing New York in 2000.
A native of Illinois, Clinton graduated from Yale Law School, and worked as a lawyer both in public service and private practice, notably as the first female partner at Rose Law Firm in Arkansas. Clinton also served as First Lady of the state of Arkansas twice, from 1979 to 1982, and form 1983 to 1992.
Hillary Clinton announced her 2016 candidacy on April 11, 2015, via social media and video. (You can watch the video below.)Further Reading/Viewing:
Via NPR: Hillary Clinton Is Back, But Will There Be A Return Of The "Rodham?"
Video: Watch Clinton's video announcement of her 2016 candidacy