Well, I think McCain's proven he can be flexible on a lot of things lately, including
abortion,
climate change, and
gay marriage. Any illusion of McCain having convictions strong enough to prevent him from cynical politicking have, IMO, been thrown out the window at this point.
"What truth endures beneath the flaming stream?"
--
A Volcano, Bartolome de Las Casas,
Inferno de Marsaya, 1536