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Others have posted that obama doesn't have anything locked up, that you shouldn't count votes before they are cast (despite what they say to a reporter, the superdelegates haven't actually voted yet).
The clintons seem to be acting on that fact.
An interesting angle to this story is whether or not obama is going to pay off the clinton's campaign debts. They want their money back.
What does obama get? billary's withdrawal from the campaign? . . . in which case it would really be over?
Another example of clintons acting on behalf of clintons.