National Journal notes that in both chambers of Congress, the Republicans who left or were defeated in 2008 were more centrist ideologically than their caucus' colleagues.
Also of note in the piece: Some of the Republicans now closest to the center in the House in vote ratings were once viewed as more conservative.
"Even more striking was the movement of Rep. Jo Ann Emerson, R-Mo.: She was the 79th-most-conservative in 2000 and the 183rd last year," write Brian Friel and Richard E. Cohen.
Interesting to me was where former Sen. Jim Talent fell on the list in 2006.
His "composite conservative score" was only 68% in 2006. National Journal describes "more-liberal" Republicans as those with ratings at 75% or below.