Trump is for a form of amnesty. He is a friend of the Establishment. He has supported them financially and he is a deal maker who will continue the get-along, go-along deal making that has beset DC for too long.
Trump pretends to be conservative but is really just a front for big money establishment campaign donors. They’ll still have plenty of influence in a Trump White House.
Congress has done nothing to stop 0bama and now Trump proposes to come in and make deals. Cruz, OTOH, has stood up, sometimes alone, to the corrupt, deal-making, get-along, go-along RINO Establishment. This is why the Establishment prefers Trump to Cruz.
That's why it makes no logical sense for Palin to come out in support of Trump instead of Cruz. Palin was demonized and her career destroyed for the very same reason...that she stood up to corruption in Alaska from both sides. And now she endorses Trump? The world has gone crazy.