There is speculation all over the place about a Schwarzenegger endorsement. "Sources" tell CNN that he'll endorse McCain tomorrow.

McCain's a gimmee for Arnie -- another maverick Republican who supports action on global warming. And since it looks increasingly likely that McCain's got it sewn up, that's probably that.

Matters would have been much more interesting if Romney got the nomination. I strongly suspect, and have heard from a few sources of my own, that Arnie would endorse a Dem over Romney. Would he endorse Hillary? I doubt it -- I bet he's just sit the race out.

But Obama? I'd bet money that Schwarzenegger would endorse Obama over Romney.

I guess now we'll never know.