If Warren makes it to the general with Trump she could be the first presidential candidate to burst out in tears live on air during a debate.
Hillary could sort of take the abuse with a '

' face after all those years. I'm not sure everyone else would keep it cool next to an opponent that behaves like a sadistic stalking serial killer when you debate him.
The Biden family has the thing with the dead son of whom the widow married the brother and then divorced. Trump will bring that up. In fact family stuff is one of the reasons why Biden was unsure about running in the first place.
As we know from inviting the people who accused Bill of abuse as debate guests Trump is willing to do anything to intimidate his opponent.
The Democratic primary is sort of kiddy pool compared to the nasty campaign that is surely to follow.