David Frum's piece in the NYT magazine is well worth your time - about as elegant and as devastating a critique of current Republicanism as you can find in one place. This is where he challenges the most:
Too often, conservatives dupe themselves. They wrap themselves in closed information systems based upon pretend information. In this closed information system, banks can collapse without injuring the rest of the economy, tax cuts always pay for themselves and Congressional earmarks cause the federal budget deficit. Even the market collapse has not shaken some conservatives out of their closed information system. It enfolded them more closely within it.
This is how to understand the Glenn Beck phenomenon.
Every day, Beck offers alternative knowledge an alternative history of the United States and the world, an alternative system of economics, an alternative reality. As corporate profits soar, the closed information system insists that the free-enterprise system is under assault. As prices slump, we are warned of imminent hyperinflation. As black Americans are crushed under Depression-level unemployment, the administration’s policies are condemned by some conservatives as an outburst of Kenyan racial revenge against the white overlord.
Meanwhile, Republican officeholders who want to explain why they acted to prevent the collapse of the U.S. banking system can get no hearing from voters seized with certainty that a bank collapse would have done no harm to ordinary people. Support for TARP has become a career-ender for Republican incumbents, and we shall see what it does to Mitt Romney, the one national Republican figure who still defends TARP.