I don't give a politician credit for "loyalty" to another politician. I give them credit for loyalty to their supporters and to their own principles!
Obama was put into power (shudder) by people putting their principles on a high shelf in a dark closet. Is that what Sarah will be doing, or can she somehow powerfully represent two opposing viewpoints at one time?
How about the possiblity of campaigning with McCain during the day while he reaches across the barbed aisle, and invigorating crowds of tea party patriots by night, as they trash McCain and exalt Hayworth??