| Pre-boomer | Daniel Akaka,
Max Baucus,
Joe Biden,
Jeff Bingaman,
Barbara Boxer,
Bill Bradley,
John Breaux,
Richard Bryan,
Dale Bumpers,
Robert Byrd,
Ben Campbell,
Larry Craig,
Dennis DeConcini,
Chris Dodd,
Byron Dorgan,
David Durenberger,
Jim Exon,
Dianne Feinstein,
Wendell Ford,
John Glenn,
Bob Graham,
Mark Hatfield,
Howell Heflin,
Fritz Hollings,
Kay Bailey Hutchison,
Daniel Inouye,
James Jeffords,
Bennett Johnston,
Nancy Kassebaum,
Edward Kennedy,
Bob Kerrey,
John Kerry,
Herb Kohl,
Frank Lautenberg,
Patrick Leahy,
Carl Levin,
Joseph Lieberman,
Harlan Mathews,
Howard Metzenbaum,
Barbara Mikulski,
George Mitchell,
Daniel Moynihan,
Sam Nunn,
Robert Packwood,
Claiborne Pell,
David Pryor,
Harry Reid,
Donald Riegle,
Chuck Robb,
Jay Rockefeller,
Paul Sarbanes,
James Sasser,
Richard Shelby,
Paul Simon,
Ted Stevens,
Paul Wellstone,
Harris Wofford | Bob Bennett,
Kit Bond,
David Boren,
Hank Brown,
Conrad Burns,
John Chafee,
Dan Coats,
Thad Cochran,
William Cohen,
Paul Coverdell,
Jack Danforth,
Bob Dole,
Pete Domenici,
Alfonse D'amato,
Lauch Faircloth,
Slade Gorton,
Phil Gramm,
Orrin Hatch,
Jesse Helms,
Trent Lott,
Richard Lugar,
Connie Mack,
John McCain,
Mitch McConnell,
Frank Murkowski,
Larry Pressler,
William Roth,
Alan Simpson,
Robert Smith,
Strom Thurmond,
Malcolm Wallop | Chuck Grassley,
Tom Harkin,
Arlen Specter,
John Warner |