McCain aides whose judgment I trust are impressed by Sarah Palin. One was particularly amused by this exchange: A nervous young McCain staffer took it upon himself to explain to Palin the facts of life in a national campaign, the intense scrutiny she'd be under from the media, the viciousness of the assault that she'd be facing, etc.: Palin: "Thanks for the warning. By the way, do you know what they say the difference is between a hockey mom and a Pit Bull?" McCain aide: "No, Governor." Palin: "A hockey mom wears lipstick."