More on ideological shift in mid-terms

In a previous post, I excerpted some comments on how the Republican Party in the mid-terms ceded the center, with moderate Republicans losing out, causing a net movement to right, leaving them as an ever more extreme party.

This interesting post, has a graphic that shows the current 109th Congress, with a conservative index plotted for Democrats (blue) and for Republicans (red), then with a dotted line showing the conservative index rating for the displaced Republicans.  (Since the new congresspeople haven't voted yet, they can't be plotted yet.):

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