Henry Martin "Scoop" Jackson was an American lawyer and politician who served as a U.S. representative (1941–1953) and U.S. senator (1953–1983) from the state of Washington. A Cold War liberal and anti-Communist member of the Democratic Party, Jackson supported higher military spending and a hard line against the Soviet Union, while also supporting social welfare programs, civil rights, and labor unions.

Harry Pulliam Cain was an American politician who served as a United States Senator from Washington who served as a Republican from 1946 to 1953. Cain is mainly remembered for his conservative and often highly-controversial views as a member of the Senate and as a friend and supporter of Senator Joseph McCarthy. Prior to his term in the Senate, he had served as the 23rd mayor of Tacoma, Washington. Following his Senate term he was widely recognized as a defender of the civil liberties of individuals accused of being security risks during the Eisenhower administration and as a community activist and moderate Republican until his death in 1979.