William Harrison Frist (born February 22, 1952) is an American physician, businessman, and politician. He began his career as a heart and lung transplant surgeon. He later served two terms as a Republican United States Senator representing Tennessee. He was the Senate Majority Leader from 2003 to 2007. Born in Nashville, Tennessee, Frist studied health care policy at Princeton University and interned for Congressman Joe L. Evins. Rather than going directly into politics, Frist earned a Doctor of Medicine degree from Harvard Medical School, becoming a surgeon at Massachusetts General Hospital and several other hospitals.