The search for someone to blame for John McCain's defeat was well under way yesterday. Many fingers, not surprisingly, were pointed at Sarah Palin. Actually, the Palin scapegoating began before the polls even opened, with top McCain staffers complaining that the Alaska governor was a "diva" given to straying "off message." Nonsense. True, she turned out not to be the magic bullet Republicans had hoped for. Then again, John McCain turned out not to be the asset Republicans had hoped for. Terming his performance - and that of the campaign itself - lackluster sort of understates the case.