Kennedy was 30 years old when he first entered the Senate following a November 1962 special election in Massachusetts 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, as well as physical injuries and mental anguish to Kennedy. He 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 the incumbent president, Jimmy Carter.
He was known for his oratorical skills. His 1968 eulogy for his brother Robert and his 1980 rallying cry for modern American liberalism were among his best-known speeches. He became recognized as “The Lion of the Senate” through his long tenure and influence. Kennedy and his staff wrote more than 300 bills that were enacted into law. Unabashedly liberal, Kennedy championed an interventionist government that emphasized economic and social justice, but he was also known for working with Republicans to find compromises. Source Wikipedia
