If you watch the video I think he is very clear in his reasoning. He doesn’t think O’Donnell can win in the general. He thinks the primary goal is stopping Obama, and that is best served by having a majority control of the Senate. It is a rational/fair strategic argument. I don’t know anything about Delaware, so no clue if O’Donnell really doesn’t have a shot in the general. I’d love to hear from locals on that.
Its that kind of thinking that lead to McCain in 2008. Sometimes standing on principals counts more than which way the wind blows. Otherwise people, such as the so-called independents, won’t trust the party.