Brad Henry, Oklahoma governor and superdelegate, endorses Barack Obama. Other undeclared superdelegates should likewise state their preferences. If there's a large pro-Clinton group out there, fine. So be it. Stand up and let yourselves be counted. If not, if you're for Obama, then even better -- raise your hand. People keep explaining to me that superdelegates have good selfish reasons to avoid declaring and giving us a chance to end this thing. That's true, but a great many of them also have constituents on whom pressure can be brought to get off the fence without waiting until June.

At this point, we know what we need to know. We know the policy differences between the candidates, we know the "freak show" issues surrounding the candidates, we know the basic shape of each candidate's core electoral coalition, and we know that in the end Obama will have a modest but real lead in elected delegates. Everyone should declare.

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