I can see how this would be generally true, but it doesn't seem to apply to a situation where America as a whole is becoming more conservative. For the Republicans in power to move left, when the country is moving right, simply illustrates that their perception is grossly flawed, (and that their timing is execrable).
My quest may help you or it might help me. I've been trying to recall a years ago politician's explanation of how the parties differed greatly around 40 or 50 years ago and that even, 'conservative' and 'liberal' had differing interpretations of the Constitution then than now. Are either of you knowledgeable enough to expand on that for me?
And, Bob, how do you know for sure that the country is becoming more conservative?