There are two things about this campaign that are wonderfuly.
1) Bill Clinton is reported to have called up his old buddy Don Trump to tell him there's an open field this year for the Republicans. Conspiracy theory: Bill was deliberately fucking with the elephants, just to say he did.
2) The Republican establishment haven't turned against Trump as hard as they could. The reason for this: they all, to a man, hate the shit out of Ted Cruz. They just hate him personally so, so much they're virtually fit to burst. So they have devoted a fair amount of their resources fucking with Cruz, to the benefit of Trump, because they'd rather Trump destroy their party than Ted lead it.