Which US senator served the longest?
Robert C. Byrd
Robert Byrd
Robert Byrd
Robert Byrd
Robert Byrd
Strom Thurmond
Robert Byrd
William Howard Taft
Strom Thurmond
Robert Byrd
Harry S. Truman
William Howard Taft
Strom Thurmond
Robert Byrd
Joe Biden
William Howard Taft
Strom Thurmond
Joseph McCarthy
Harry S. Truman
John F. Kennedy
Daniel Inouye
Robert Byrd
Joe Biden
Strom Thurmond
William Howard Taft
Joseph McCarthy
Robert Byrd
John F. Kennedy
Joe Biden
Daniel Inouye
William Henry Harrison
Joseph McCarthy
Bob Dole
Strom Thurmond
William Howard Taft
Charles Sumner
Edward M. Kennedy
Harry S. Truman
Tom Daschle
Robert Byrd
Joe Biden
Joseph McCarthy, Jr.
Joseph McCarthy
William Henry Harrison
Bob Dole
Strom Thurmond
Daniel Inouye
Charles Sumner
William Howard Taft
Joseph McCarthy
Joe Biden
Tom Daschle
Robert Byrd
Henry Cabot Lodge
William Henry Harrison
Bob Dole
Strom Thurmond
Joseph McCarthy, Jr.
Harry S. Truman
William H. Seward
Charles Sumner
Joseph McCarthy
Charles Sumner Wells
Joe Biden
Robert Byrd
Henry Cabot Lodge
William Henry Harrison
Bob Dole
Strom Thurmond
Edward M. Kennedy
William Howard Taft
John McCain
Charles Sumner
Joseph McCarthy, Jr.
Joseph McCarthy
John F. Kennedy
Joe Biden
Charles Sumner Wells
William Henry Harrison
Robert Byrd
Henry Cabot Lodge
Bob Dole
Tom Harkin
Strom Thurmond
John McCain
Charles Sumner
Joseph McCarthy
Ted Kennedy
Joe Biden
Joseph McCarthy, Jr.
Charles Sumner Wells
Harry S. Truman
William Henry Harrison
Bob Dole
Tom Harkin
Strom Thurmond
Robert Byrd
Henry Cabot Lodge
John McCain
Edward M. Kennedy
Joseph McCarthy
Charles Sumner
William Howard Taft
Joe Biden
Henry A. Wallace
Robert Byrd.
Henry Cabot Lodge III
John F Kennedy
Frank Lautenberg
Ted Kennedy
William Henry Harrison
Charles Sumner Wells
John McCain
Strom Thurmond
Howard Baker
William H. Seward
Robert Byrd
Henry Cabot Lodge
Joseph McCarthy, Jr.
Joseph McCarthy
William Henry Seward
Charles Sumner
George McGovern
John Dingell
Joe Biden
John F Kennedy
John McCain
Howard Baker
William Henry Harrison
Strom Thurmond
Joseph McCarthy
Charles Sumner Wells
Robert Byrd
Henry Cabot Lodge III
Frank Lautenberg
Ted Kennedy
Strom Thurmond.
William Henry Seward
Harry S. Truman
Joseph McCarthy, Jr.
Edward Kennedy
Charles Sumner
John F. Kennedy
John McCain
Howard Baker
George McGovern
William Henry Harrison
Joseph McCarthy
Strom Thurmond
Edward M. Kennedy
Charles Sumner Wells
Robert Byrd
Henry Cabot Lodge III
Strom Thurmond.
William Henry Seward
Robert Byrd.
Ted Kennedy
John McCain
Harry S. Truman
Howard Baker
Henry A. Wallace
Harry S Truman
Joseph McCarthy, Jr.
John F Kennedy
Joseph McCarthy
Edward Kennedy
Henry Cabot Lodge II
William H. Seward
Frank Church
John Dingell
Strom Thurmond
Charles Sumner
Robert Byrd
Charles Sumner Wells
Henry Cabot Lodge III
Strom Thurmond.
William Henry Seward
John McCain
William Henry Harrison
George McKinley
Joseph McCarthy
Harry S Truman
Edward Kennedy
Frank Church
Charles Sumner Smith
Ted Kennedy
Strom Thurmond
Henry Cabot Lodge II
Robert Byrd
John F. Kennedy
John McCain
Henry Cabot Lodge III
Strom Thurmond.
William Henry Seward
Joseph McCarthy
Charles Sumner Wells
Frank Church
Ted Kennedy
Joseph McCarthy, Jr.
Harry S Truman
John F Kennedy