Jonathan Bernstein summarizes the GOP's position on Simpson-Bowles as “We’re against Simpson-Bowles, but you should be for it. Just because”:
I’ve been trying to figure out the logic to this one for a while. The best I have is that it’s Republicans think so little of centrist budget-balancers (who absolutely love Simpson-Bowles) that they believe those centrist budget-balancers can be duped into turning against Barack Obama even though Republicans are supporting a tax plan which will almost certainly blow up the deficit, just because Republicans are willing to say nice things about Simpson-Bowles. Even though they oppose it.