Good question. I would hope the liberal or "moderate" wing of the GOP would be doing it. If they don't, or if McCain thinks he can take his "high road" to victory, he is crazier than I thought.
When the Democrats have held their convention & it’s just McCain vs Obama, we’ll start hearing about The Keating Five, of which McCain was a member.
My guess is that even if the country clubbers come up with the money for such a thing, it will be denounced by the McCain campaign.