NationalJournal.com
H/T Hotline On Call
2/26/2010
The 10 Most Liberal Senate Dems:
1. Sherrod Brown (D-OH)
2. Roland Burris (D-IL)
3. Ben Cardin (D-MD)
4. Jack Reed (D-RI)
5. Sheldon Whitehouse (D-RI)
6. John Kerry (D-MA)
7. Frank Lautenberg (D-NJ)
8. Barbara Mikulski (D-MD)
9. Chris Dodd (D-CT)
10. Dick Durbin (D-IL)
The 10 Most Conservative Senate Republicans:
1. Jim Inhofe (R-OK)
2. Jim DeMint (R-SC)
3. Jim Bunning (R-KY)
4. Tom Coburn (R-OK)
5. Jim Risch (R-ID)
6. John Thune (R-SD)
7. John Ensign (R-NV)
8. Mitch McConnell (R-KY)
9. Richard Burr (R-NC)
10. Jeff Sessions (R-AL)
The list of liberal House Dems and conservative House Republicans can be found at Hot Line On Call and at National Journal.
Update: More at The Providence Journal