Now = Hillary get the nod and half the party is in shambles due to the loss of the messiah O
Later = The big O gets the Nomination and it is then released, he is toast.
It is a win win.
Hillary is not going to have her fingerprints anywhere near this tape if it is released prior to the convention. She will put it on the Republicans, and the media will back her up. If there is a tape to be released we should hope it is held to at least October, so that the fatal blow to Obama campaign = a fatal blow to the Democrats. Maybe I'm wrong on this, but better safe than sorry.