Vice President Lyndon B. Johnson assumed the presidency upon Kennedy's death. Marxist and former U.S. Marine Lee Harvey Oswald was arrested for the state crime, but he was shot and killed by Jack Ruby two days later. The FBI and the Warren Commission both concluded Oswald had acted alone in the assassination, but various groups contested the Warren Report and believed that Kennedy was the victim of a conspiracy. In September 1931, Kennedy started attending Choate, a prestigious boarding school in Wallingford, Connecticut, for 9th through 12th grade. His older brother Joe Jr. had already been at Choate for two years and was a football player and leading student. In the presidential election, Republican Dwight D. Eisenhower carried Massachusetts by a margin of 208,000 votes, but Kennedy defeated Lodge by 70,000 votes for the Senate seat. The following year, he married Jacqueline Bouvier.