FWIW that doesn't really matter. McCain is going to do what he's going to do. So will any Dems he tries to turn. There is no election over this so what anyone says is irrelevant.
Yes, that's it. There's no election going on, so this can just be a one-off. It might represent a major change, it might not.
But whatever, I'm just glad that somebody is trying to encourage opposition to this hideous bill. I was out and about today, and when I looked at my fellow Americans blithely shopping, I wondered how many of them even know about the bill or care. But maybe they're like me: they don't know exactly what to do, so they just keep on doing what they always do and hoping that something will happen to derail this disaster.