The ideal situation would be for Hillary to only have enough delegates for the win with superdelegates. That will have Bernie supporters royally steamed.
That, plus a pie fight between the FBI and DOJ about indicting Hillary. And Hillary must refuse to be dragged off the stage by the Democrats, even clutching at the carpet with her fingernails.
Bernie staying in and doing well in primaries shows Hillary’s weakness, which will manifest itself in the general election. Do the party bosses want to nominate a sure loser?
Their primary process is an outright rigged sham.