Short answer, no. Do Not Run The Grumpy Old Guy.
This should be a no brainer. Whoever Newsweek examines, don't vote for the guy. Nothing against Haley Barbour but the last time two times the GOP ran a grumpy old man to be president-- Bob Dole and John McCain-- they lost.
One more time. Do Not Run The Grumpy Old Guy. He can cure cancer but the Left Wing Media will portray him as the Grumpy Old Guy.
UPDATE: Smitty links up from The Other McCain.