Do you believe Hillary has anything on Barry?
If she does not then she is toast.
Team Obama and Team Clinton are just shaping the battlespace now. Perhaps we are seeing some preliminary skirmishes.
There's a third combatant, though, Team Donors, who want to be paid back for the billion or so given to the Clintons, and they haven't chosen sides.
If Team Clinton shoots at Obama, they have to win, or they're going down hard.