In Kerry's personal life, other rich veins of opposition research will be mined. He abandoned his wife and children (we never see them, do we?), and married a relatively geriatric heiress, who made him sign a pre-nup.
If his own wife can't trust him without a legal restriction, why should we?
Kerry dumped the first wife and family for a presumably better, richer wife. IMO, he's a creep.