Original sentence: From 1961-1966 he was the Senate Majority Leader.He married Catherine Marie Beale, cousin of Jacqueline Lee Bouvier, and had 7 children.He then became a U.He was assassinated in Miami, FL by Cuban nationalists who are believed to be connected to the Cuban Communist Government.Referred to usually as "Tommy" or "TJK", he was Assisstant Secretary of the Navy during the second term of President Harry Truman.Representative and a U.Senator from Massachusetts.Thomas James Kennedy (1919–1966)