Zell is the one:
A mathematician did a correlation analysis of voting records over 498 roll call votes from 1998 to 2000. This ranked the 100 Senators. On his scale the most liberal Democrat has the lowest score, Feingold WI (1), and the most conservative Senator Kyl AZ (102). Zell Miller was the least liberal Democrat, interestingly only one Repubican was more liberal then him (Chafee of RI). I don't have a web link but here is the journal reference:
"Non-Parametric Unfolding of Binary Choice Data." Political Analysis, 8:211-237, 2000.
I tried the same once, for the 2000-2 period. I lost interest somewhere in the middle, but up to the point I did that, there were quite a number of Republicans more Democratic (not the same as more liberal, I know) than Miller.
Specter, McCain, Susan Collins, at least two or three more. (I remember being surprised at how unconservative Thad Cochran of MS was. I don't think he was much more Rep. than Miller, may have been less)
Effectively, Miller
is a Republican and Chafee is a Democrat. They both vote with the other party more than 50% of the time. I think they are alone in this regard though.
