Yes, if Edwards wins two today...he may hang on in the southern primaries coming up and have an itty-bitty chance after.
Edwards is underestimated in the race for the nomination and overestimated nationally. I don't see how a trial-lawyer with little national experience and trying to sell a "two Americas" story is going to get elected. The ones voting for him have to admit that they have failed to succeed.
I think he sounds and looks good, but I'm not American. He could change things a lot, doing his poor, Southern background, how he isn't a politician, and so on.