I think you are correct in that obumbler will come back at Romney with a vengeance.
That can work two ways. A good fighter can use anger to fight a better fight.
But obumbler is Narcissistic. An egomaniac. So I am betting that he will lose his temper and leave himself open to a knockout punch.
Absolutely, Obama might be so agressive and nasty that he loses it in front of everyone. His ego cannot tolerate being challenged by a smart, well prepared opponent who smiles at him. It drives him nuts.
Romney has gotten inside Obama’s head and can push his buttons.