Fun, fun, fun.
Remember four years ago when there were several candidates that had absolutely no chance of winning? They could have dropped out of the race and likely denied Romney the nomination but stayed in and ensured Romney's success. Newt was one of them, and Cruz is one this year. The GOPe has no intention of letting Cruz get anywhere near the Oval, or Trump either for that matter and they have no problem using Cruz to damage Trump.
Trump is truly a candidate that appeals to disgruntled voters of all stripes no other candidate does that.
Yes, remember 4 years ago, and 8 years ago, it seems like eternity.