Most are Cruz supporters who have yet to see what the media and the GOPe plans to do to take out Cruz if they manage take out Trump. They do have plans.CatherineofAragon's response in Post #132 (Bring it) is right on.
Being from Indiana (from your FR profile page), perhaps you're not familiar with the details of the Texas GOP primary for U.S. Senate in 2012.
Cruz's opponent in the 2012 primary, Lt. Gov. David Dewhurst, was backed by the entire GOPe in Texas from the Governor on down.
Dewhurst ran a constant barrage of the most despicable, deceitful negative TV ads imaginable against Cruz and outspent Cruz 3 to 1. It was the worst stuff voters in Texas had seen in many years. Cruz handled it masterfully as CofA believes he will in the future. The ads backfired on Dewhurst big time.
Cruz started the race at 2% in the polls and ended up defeating Dewhurst by 14 points in the runoff election (57-43).
Karl Rove mocked Cruz for getting into that Senate race, and told him he didn’t have a prayer, that he was a sure loser. Ted laughed in his face.
He has campaigning honed down to a fine skill. He made a study of losing campaigns so that he knows exactly what to avoid, and he doesn’t let advisors mislead him into saying or doing something he instinctively knows is wrong.