Unfortunately, I doubt Trump can go after Hillary and vice versa...they most likely have the goods on each other. I think Trump will come back with gusto after New Hampshire. It is now winnowing down to a two man race, Trump and Cruz...I feel Rubio may peter out (no pun intended).
Not sure what she could have on him but her past is rich in fertilizer.
Trump has no bounds in street fighting and he is not reluctant to call out an opponent. He would have no quams when ripping her a new one.