Edward Moore "Ted" Kennedy was a United States Senator from Massachusetts and a member of the Democratic Party. In office since November 1962, Kennedy served nine terms in the Senate. At the time of his death, he was the second most senior member of the Senate, after Robert Byrd of West Virginia, and the third-longest-serving senator in U.S. history. He was best known as one of the most outspoken and effective Senate proponents of liberal causes and bills. For many years the most prominent living member of the Kennedy family, he was the youngest brother of President John F. Kennedy and Senator Robert F. Kennedy, both victims of assassinations, and the father of Congressman Patrick J. Kennedy. He died of brain cancer.