Which politician holds the record for the longest continuous service in the United States Senate, with over 56 years of representation? Joe Biden Mitch McConnell Diane Feinstein Robert Byrd None Who is the longest-serving monarch in modern history, with over 70 years on the throne of the United Kingdom? Queen Elizabeth II King George III Queen Victoria King Edward VII None Which leader holds the distinction of being the longest-serving Chancellor of Germany, guiding the country through reunification and a united Europe? Helmut Schmidt Angela Merkel Gerhard Schröder Konrad Adenauer None Which leader served as the President of Cuba for over 49 years, making him one of the longest-serving heads of state in modern history? Fidel Castro Che Guevara Raúl Castro Camilo Cienfuegos None Who holds the record for the longest-serving prime minister in British history, with over 21 years in office? Margaret Thatcher Winston Churchill Tony Blair David Cameron None Time's up
