It barely worked when the maverick McCain, no darling of the Bushites, got the nomination. With Palin, the Washington outsider, the “third term” argument is plainly absurd. But Obama can’t let go, just as the lefties can’t let go of the Swiftboat Veterans for Truth defeat of Kerry. He can’t move on.

Obama has the habit, too, of reminding voters of their doubts about him, as he did in reminding a Detroit audience that he’s been accused of being less interested in protecting you from terrorists than reading them their rights. And, when he professes love of country as his basis for refusing to allow the McCain campaign to attack his words, he raises questions about why he finds the affirmation of love necessary.

Obama will lose because with less than two months remaining voters won’t be able to get comfortable with him. He can’t stay on message and he can’t avoid sending signals that interfere with the message when he does.