Who are the most liberal and conservative members of Congress?

According to the National Journal via The Hill:

National Journal has released its annual list of the most liberal and conservative members of Congress.

In the Senate, there's a five-way tie for the most liberal: Sens. Sherrod Brown (D-Ohio), Roland Burris (D-Ill.), Ben Cardin (D-Md.), Jack Reed (D-R.I.) and Sheldon Whitehouse (D-R.I.).

Sen. Jim Inhofe (R-Okla.) takes the sole prize for most conservative Senator....