I doubt Chris is going to allow that from President Trump. Biden on the other hand might act like a bastard while Chris Wallace will take on the role of Candy Crowley and help Biden.
Trump will do a fine debate bit as we know they will say Joe won it even if he dies on stage.
Joe is going to be amped up on drugs I imagine his eyes will be very black with his dilated pupils.
You are right - Wallace will intervene immediately on behalf of Biden on any Trump statement that he finds “out of bounds” to the “rules you both agreed to abide by”.
Expect Biden to call Trump a liar multiple times on the stage, either without any details to substantiate the accusation or with made up “facts”. Wallace will not call out Biden.
Will they examine Joe before the debate to make sure he doesn’t have an earwig?