Edward Moore "Ted" Kennedy (February 22, 1932 – August 25, 2009) was an American politician who served as a United States Senator from Massachusetts for over forty years from 1962 until his death in 2009. A member of the Democratic Party, he was the second most senior member of the Senate when he died and is the fourth-longest-continuously-serving senator in United States history, having served there for almost 47 years. For many years, Ted Kennedy was the most prominent living member of the Kennedy family, and he was also the last surviving, longest-living, and youngest son of Joseph P. Kennedy, Sr. and Rose Kennedy. He was the youngest brother of John F. Kennedy—the 35th President of the United States—and Senator Robert F. Kennedy, both victims of assassination, and the father of Congressman Patrick J. Kennedy.
Ted Kennedy was 30 years old when he first entered the Senate following a November 1962 special election to fill the vacant seat previously held by his brother, John, who had taken office as the President. He was elected to a full six-year term in 1964 and was later re-elected seven more times. The Chappaquiddick incident in 1969 resulted in the death of his automobile passenger, Mary Jo Kopechne. Kennedy pleaded guilty to a charge of leaving the scene of an accident and later received a two-month suspended sentence. The incident and its aftermath hindered his chances of ever becoming President. His only attempt, in the 1980 election, resulted in a Democratic primary campaign loss to incumbent President Jimmy Carter, who was later defeated in the general election by Republican opponent Ronald Reagan.