Tire Rotation: As metaphors go ... Senator McCain just got a flat. After nearly a week during which he, his surrogates, and the RNC spent mocking Senator Obama for suggesting -- in response to a question -- tire inflation as a way to improve mileage and save gas ... Senator McCain has come out and endorsed (drum beats) tire inflation! as a way to improve mileage and save gas. Our fifth story on the Countdown: Senator McCain spinning his wheels. Another apt metaphor.