Sarah Palin appears to have no testable core conviction except the belief (which none of her defenders denies that she holds, or at least has held and not yet repudiated) that the end of days and the Second Coming will occur in her lifetime. This completes the already strong case for allowing her to pass the rest of her natural life span as a private citizen.
Republicans know well that a change of rhetorical pace is necessary. But efforts by their leaders to damp down the bellicosity of newly elected Tea Party types is running into the fact that the Tea Partiers have only the high volume setting on their amplifiers, just like Palin. They're like a couple having a fight at a funeral; politely sotto voce, then suddenly bursting out fortissimo with their plaints and accusations.