I think it’s too late for the Dems to dump Hillary now. There isn’t enough money in the world the DNC can give Hillary and Bill for them to go away. They want the power. If the FBI goes ahead and indicts her then all the dirt Bill and Hillary have on their fellow Democrats and Republicans as well will be unleashed, and it will be Armageddon for everybody.
I don’t think her ego would let her withdraw, but I would laugh so much if she had one of her coughing episodes during her acceptance speech, or better yet, during the debates with Trump