Prescott Sheldon Bush (May 15, 1895 – October 8, 1972) was a Wall Street executive banker and a United States Senator, representing Connecticut from 1952 until January 1963. He was the father of George H. W. Bush (41st President of the United States) and the grandfather of George W. Bush (43rd President of the United States) and Jeb Bush (43rd Governor of Florida).

Bush was born in Columbus, Ohio, to Samuel Prescott Bush and Flora Sheldon Bush. Samuel Bush was a railroad executive, then a steel company president, and, during World War I, also a federal government official in charge of coordination and assistance to major weapons contractors.

Bush attended St. George's School in Newport, Rhode Island, from 1908 to 1913. In 1913, he enrolled at Yale University, where his grandfather James Smith Bush, class of 1844, and his uncle Robert E. Sheldon Jr., class of 1904, had matriculated. Three subsequent generations of the Bush family have been Yale alumni. Prescott Bush was admitted to the Zeta Psi fraternity and Skull and Bones secret society. George H. W. Bush and George W. Bush are also members of that society.

Smedley Darlington Butler (July 30, 1881 – June 21, 1940) was a Major General in the U.S. Marine Corps, an outspoken critic of U.S. military adventurism, and at the time of his death the most decorated Marine in U.S. history.

During his 34-year career as a Marine, he participated in military actions in the Philippines, China, in Central America and the Caribbean during the Banana Wars, and France in World War I. By the end of his career, he had received 16 medals, five for heroism. He is one of 19 men to twice receive the Medal of Honor, one of three to be awarded both the Marine Corps Brevet Medal and the Medal of Honor, and the only man to be awarded the Brevet Medal and two Medals of Honor, all for separate actions.

In his 1935 book War is a Racket, he described the workings of the military-industrial complex and, after retiring from service, became a popular speaker at meetings organized by veterans, pacifists and church groups in the 1930s.

In 1934, he became involved in a controversy known as the Business Plot when he told a congressional committee that a group of wealthy industrialists were planning a military coup to overthrow Franklin D. Roosevelt. The purported plot would have had Butler leading a mass of armed veterans in a march on Washington. The individuals identified denied the existence of a plot, and the media ridiculed the allegations. The final report of the committee stated that there was evidence that such a plot existed, but no charges were ever filed. The opinion of most historians is that while planning for a coup was not very advanced, wild schemes were discussed.

Jacob Leon Rubenstein (March 25, 1911 – January 3, 1967), who legally changed his name to Jack Leon Ruby in 1947, was convicted of the November 24, 1963 murder of Lee Harvey Oswald, the accused assassin of President John F. Kennedy. Ruby, who was originally from Chicago, Illinois, was then a nightclub operator in Dallas, Texas. Convicted of the murder on March 14, 1964, Ruby appealed the conviction and death sentence. As a date for his new trial was being set, he became ill and died of lung cancer on January 3, 1967.

Ruby was involved with major figures in organized crime; conspiracy theorists claim that he killed Oswald as part of an overall plot surrounding the assassination of Kennedy. Others have disputed this, arguing that his connection with gangsters was minimal at most and that he was not the sort to be entrusted with such an act within a high-level conspiracy.

Ruby was known to have been acquainted with both the police and the Mafia, specifically the Italian Mafia. The House Select Committee on Assassinations said that Ruby had known restaurateurs Sam (1920–1970) and Joseph Campisi (1918–1990) since 1947, and had been seen with them on many occasions. After an investigation of Joe Campisi, the HSCA found:

Richard Milhous Nixon (January 9, 1913 – April 22, 1994) was the 37th President of the United States, serving from 1969 to 1974. The only president to resign the office, Nixon had previously served as a US representative and senator from California and as the 36th Vice President of the United States from 1953 to 1961.

Nixon was born in Yorba Linda, California. After completing his undergraduate work at Whittier College, he graduated from Duke University School of Law in 1937, and returned to California to practice law. He and his wife, Pat Nixon, moved to Washington to work for the federal government in 1942. He subsequently served in the United States Navy during World War II. Nixon was elected to the House of Representatives in 1946 and to the Senate in 1950. His pursuit of the Hiss Case established his reputation as a leading anti-communist, and elevated him to national prominence. He was the running mate of Dwight D. Eisenhower, the Republican Party presidential nominee in the 1952 election. Nixon served for eight years as vice president. He waged an unsuccessful presidential campaign in 1960, narrowly losing to John F. Kennedy, and lost a race for Governor of California in 1962. In 1968, he ran again for the presidency and was elected.

Gerald "Jerry" Labriola (born May 17, 1931) is a mystery writer, physician, and assistant professor at the University of Connecticut Medical School. In Connecticut's 1994 U.S. Senate election, he ran as the Republican nominee against Democrat Joe Lieberman, losing to the incumbent. He has also run for governor and has served as a Connecticut state senator.