Believe me, if the Clintons can fire it at him, it would have already been used. They will throw anything, and the kitchen sink, to tear him down.
By the time Hillary is out, he will be fully immunized.
you have to be desperate to employ the nuclear option and I think that she is at that point now. They are now ‘finding out’ that negative ads work and Mark Penn may finally get his way now (he wanted to go negative earlier but was overruled).