The pardon mechanism prevents prosecution for any reason. If Obama pardons Clinton, it protects her from a politically motivated prosecution and even possible conviction. The fact that she did much less -- if anything, really -- than other officials who were pardoned is an argument for pardoning her. Do you think there would be some honor in allowing her to be dragged into a long, very expensive federal criminal trial? Is that your point? Or do you think a pardon is some kind of short-circuit judgment of guilt? It is not.
Would you like to be put in the same category of Nixon and the Iran/Contragate fools?
I know that Hillary won't.