There's no equality here, D.  It is not Hillary who's accused of sexual misdeeds.  She, not Bill, is the candidate.  So, we have a woman who vented her spleen on women (and incidentally, her husband too) who engaged in illicit sex.  And we have a candidate (Trump) who actually engaged in that activity.
As for defending a rapist, that's what attorneys who are assigned by the court sometimes have to do.  In this country even the guilty are afforded a defense.