Senate Seniority: Hawaii's Daniel Inouye Is Now President Pro Tempore : It's All Politics With Robert Byrd's death, Hawaii Democrat Daniel Inouye is now the longest serving senator of the majority party, also known as the Senate President Pro Tempore.
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Senate Seniority: Hawaii's Daniel Inouye Is Now President Pro Tempore

It's hard to imagine the Senate without Robert Byrd and Ted Kennedy, whose combined seniority approached an entire century.  Here's the current seniority list and where it was just a year and a half ago.

CURRENT SENATE SENIORITY

1.  Daniel Inouye (D-Haw.) — Jan. 9, 1963

2.  Pat Leahy (D-Vt.) — Jan. 3, 1975

3.  Dick Lugar (R-Ind.) — Jan. 4, 1977

4.  Orrin Hatch (R-Utah) — Jan. 4, 1977

5.  Max Baucus (D-Mont.) — Dec. 15, 1978

6.  Thad Cochran (R-Miss.) — Dec. 27, 1978

7.  Carl Levin (D-Mich.) — Jan. 15, 1979

8.  Chris Dodd (D-Conn.) — Jan. 5, 1981

9.  Arlen Specter (D-Pa.) — Jan. 5, 1981

10.  Charles Grassley (R-Iowa) — Jan. 5, 1981

Here's what it was just prior to the 2008 election:

1.  Robert Byrd (D-W.Va.) — Jan. 7, 1959

2.  Edward Kennedy (D-Mass.) — Nov. 7, 1962

3.  Inouye

4.  Ted Stevens (R-Alaska) — Dec. 24, 1968

5.  Joe Biden (D-Del.) — Jan. 3, 1973

6.  Leahy

7.  Lugar

8.  Hatch

9.  Baucus

10.  John Warner (R-Va.) — Jan. 2, 1979