Actually, I don't know.
But it sounds like one of those things that someone says over doughnuts and coffee. "Hey, John, I got this wild idea... Wouldn't it just set them on their asses if you..." chuckle chuckle chuckle
And a legend is born.
If McCain says he was never offered it, I'm sure it was never a formal offer. It might have been a joke offer though. :)
