If Joe girds his loins and jumps in, all is fair game.
Donald should make ads showing still photos of Biden putting his hands all over women and young girls, usually while at a ceremonial occassion, where they have to show some restraint from smacking his hands away. What about that photo of Biden sitting with his open palm gently holding the thigh of a middle aged sheriff? The look on that sheriff’s face said it all; “If you weren’t the VP, you would be getting a knuckle sandwich, right about now!”
Well.... that just shows that Biden is not sexist. He'll put his hands on anybody.