Unfortunately for the republicans, Fox has been vetting Hillary for going on 8 years. There is little new dirt they could dish up.
I appreciate how terrified Fox is of Hillary given how strong a candidate she is ( especially when viewed against potential runners like Fiorina/Bush/Christy/Huckabee ), but their constant attacks on Hillary will really only benefit the democrats in the long run.
The irony is delicious.
( note: I hate all candidates/parties. Equally though, and isn't that what we're going for afterall? Equality! )