A better question is how were the entrance polls so wrong?
Every one of them had people going into the caucus locations for Trump 27-23.
Cruz cheated! [s]
http://www.washingtonexaminer.com/trump-loss-could-mean-trouble-ahead/article/2582165
“....................Most of the people at the Trump event had attended caucuses earlier in the evening. At those caucuses, the presiding officer asked whether there was a representative from each campaign present to speak, and, if not, whether anyone attending would like to speak on a particular candidate’s behalf. At the caucus I attended, in Pleasant Hill, a suburb just east of Des Moines, there was no one to speak for Trump — no representative of the campaign — and no voter willing to stand up and speak on his behalf. (The precinct ended in a Cruz landslide: 110 votes for the Texas senator, versus 36 for Trump and 34 for Rubio.)
At the Sheraton, some Trump supporters had similar stories.
“We were at a caucus and Trump didn’t even have anyone there to speak for him,” one man told me.
“That’s insane,” added a man nearby.
The GOPe’s Stop Trump strategy was successful. They convinced enough voters to dump all the other candidates and split their votes between Rubio and Cruz.
The Caucus is the perfect setting for doing this.
Will not be nearly so easy in primaries.
Yeah, like a net 10 point difference.
One difference is that Cruz was flipping voters inside caucus saying Carson dropped out.
As far as the Cruz win, he and Rush launched operation chaos against Trump last few day. If you don’t stop Trump here, he’ll be unstoppable. Thus some who favored another candidate voted Cruz to give their guy or gal a chance.
It’s evangelical to LIE:-)