Writing about Sarah Palin in Newsweek last month, I pointed out the crude way in which she tried to Teflon-ize herself when allegations of weird political extremism were made against her. Thus, she had once gone to a Pat Buchanan rally wearing a pro-Buchanan button, but only because she thought it was the polite thing to do. She and her husband had both attended meetings of the Alaskan Independence Party—he as a member—but its name, she later tried to claim, only meant "independent." (The AIP is a straightforward secessionist party.) She didn't disbelieve all the evidence for evolution, only some...