They are in support of filibuster as a matter of principle. Clinton was a consistent NAY vote; Kerry was a consistent NOT PRESENT or NAY.
Cloture Motions on Circuit Court Nominations in 108th Congress
http://www.senate.gov/pagelayout/reference/cloture_motions/108.htm
Date Nominee Filed By Date Vote Result DEM Aye's for Cloture ------ ------- -------- ------ ----------- --------------------- Jul 21 David W. McKeague Frist Jul 22 53-44 No.162 F Miller, Nelson (NE) Jul 21 Richard A. Griffin Frist Jul 22 54-44 No.161 F Miller, Nelson (NE) Jul 20 Henry W. Saad Frist Jul 22 52-46 No.160 F Miller Jul 16 William G. Myers Frist Jul 20 53-44 No.158 F Biden, Nelson (NE) May 14 Marcia G. Cooke Kyl May 18 UC V Nov 12 Janice R. Brown Frist Nov 14 53-43 No.452 F Miller, Nelson (NE) Nov 12 Carolyn B. Kuhl Frist Nov 14 53-43 No.451 F Miller, Nelson (NE) Nov 12 Priscilla R. Owen Frist Nov 14 53-42 No.450 F Miller, Nelson (NE) Nov 04 William H. Pryor Santorum Nov 06 51-43 No.441 F Miller, Nelson (NE) Oct 28 Charles W. Pickering McConnell Oct 30 54-43 No.419 F Breaux, Miller Jul 30 Carolyn B. Kuhl Frist Jul 31 UC V Jul 29 William H. Pryor McConnell Jul 31 53-44 No.316 F Miller, Nelson (NE) Jul 28 Miguel A. Estrada Sessions Jul 30 55-43 No.312 F Breaux, Miller, Nelsons (NE/FL) Jul 25 Priscilla R. Owen Hatch Jul 29 53-43 No.308 F Miller, Nelson (NE) Jun 27 Victor J. Wolski Frist Jul 08 UC V May 06 Priscilla R. Owen McConnell May 08 52-45 No.144 F Miller, Nelson (NE) May 06 Miguel A. Estrada McConnell May 08 54-43 No.143 F Breaux, Miller, Nelsons (NE/FL) May 01 Miguel A. Estrada McConnell May 05 52-39 No.140 F Breaux, Nelsons (NE/FL) Apr 29 Priscilla R. Owen McConnell May 01 52-44 No.137 F Miller, Nelson (NE) Mar 31 Miguel A. Estrada Bennett Apr 02 55-44 No.114 F Breaux, Miller, Nelsons (NE/FL) Mar 13 Miguel A. Estrada Frist Mar 18 55-45 No. 56 F Breaux, Miller, Nelsons (NE/FL) Mar 11 Miguel A. Estrada Frist Mar 13 55-42 No. 53 F Breaux, Miller, Nelsons (NE/FL) Mar 04 Miguel A. Estrada Frist Mar 06 55-44 No. 40 F Breaux, Miller, Nelsons (NE/FL)
But taking it to the level of using the filibuster for a Supreme Court nominee takes it to a new level. One that should terrify a potential President.