Who is the longest serving senator?
Robert C. Byrd
Robert Byrd
Robert Byrd
Robert Byrd
Robert Byrd
Robert Byrd
Strom Thurmond
Joe Biden
Robert Byrd
Strom Thurmond
Bob Dole
Robert Byrd
Strom Thurmond
Bob Dole
Joe Biden
Ted Kennedy
Robert Byrd
Tom Daschle
Strom Thurmond
Bob Dole
Ted Kennedy
Joseph Biden
John McCain
Edward M. Kennedy
Tom Daschle
Joe Biden
Strom Thurmond
Bob Dole
Robert Byrd
Ted Kennedy
Frank Lautenberg
John McCain
John Dingell
Joe Biden
Strom Thurmond
Edward M. Kennedy
Tom Daschle
Bob Dole
Joseph Biden
Robert Byrd
Ted Kennedy
John McCain
Frank Lautenberg
John Dingell
Joe Biden
Charles Schumer
Strom Thurmond
Joseph Lieberman
Tom Daschle
Bob Dole
Ted Kennedy
Robert Byrd
Harry Reid
John Dingell Jr.
John McCain
Frank Lautenberg
John Dingell
Edward M. Kennedy
Joe Biden
Strom Thurmond
Ted Kennedy
Tom Daschle
Bob Dole
Charles Schumer
Harry Reid
John McCain
Ted Stevens
Robert Byrd
Frank Lautenberg
Tom Harkin
Joe Biden
Strom Thurmond
John McCain, Jr.
Ted Kennedy, Jr.
Bob Dole
John Dingell
Harry Reid
Tom Daschle
Charles Schumer
John McCain
Joseph Lieberman
Ted Kennedy
Edward M. Kennedy
Frank Lautenberg
Robert Byrd
Joseph McCarthy
Tom Harkin
Joe Biden
Strom Thurmond
Joseph McCarthy, Jr.
Harry Reid
John Dingell Jr.
Ted Stevens
Bob Dole
John Dingell
John McCain
Ted Kennedy
Tom Daschle
Charles Schumer
John Kerry
Joseph McCarthy
Tom Harkin
Joe Biden
Strom Thurmond
Joseph Lieberman
Harry Reid
Robert Byrd
Edward M. Kennedy
John McCain
Bob Dole
Ted Kennedy
Charles Schumer
John Kerry
George McGovern
Joseph McCarthy
John Dingell
Harry Reid
Tom Harkin
Joe Biden
Strom Thurmond
Howard Baker
Robert Byrd III
Richard Nixon
John McCain
Ted Kennedy
Tom Coburn
Robert Byrd
Bob Dole
Charles Schumer
John Kerry
Robert Byrd II
John Dingell Jr.
John McCain, Jr.
Ted Kennedy, Jr.
Joseph McCarthy
George McGovern
Harry Reid
Howard Baker
Charles Sumner
Richard Nixon
John McCain
Tom Harkin
Ted Kennedy
Edward M. Kennedy
Joe Biden
Strom Thurmond
Robert Byrd III
Bob Dole
Robert Byrd
John Kerry
Charles Schumer
Joseph Lieberman
Joseph McCarthy
Robert Byrd II
Edward Kennedy
Harry Reid
Richard Nixon
John McCain
Ted Kennedy
Joe Biden
Strom Thurmond
Bob Dole
Robert Byrd III
Robert Byrd
Robert Byrd.
John Kerry
Harry Reid
Edward M. Kennedy
Robert Byrd II
Richard Nixon
John McCain
Ted Kennedy
Joe Biden
Strom Thurmond
Robert Byrd Jr
Bob Dole
Joseph McCarthy
John Dingell Jr.
Joseph Lieberman
Tom Daschle.
Robert Byrd III
Harry Reid
Richard Nixon
John McCain
Robert Byrd
Ted Kennedy
Robert Byrd II
Robert Byrd.
Strom Thurmond.
John Kerry
Robert Byrne
Joe Biden
Bob Dole
Robert Byrd III
John McCain
Ted Kennedy
Robert Byrd Jr
Robert Byrd
Robert Byrd II
John Dingell Jr.
Robert Byrd.