I think you are putting too much credit into the Iowa Caucus, it does give Cruz the opportunity to live another day on the campaign but it certainly does not put him in control of anything
I am sure Huckabee and Santorum would love to explain this to you
The two previous winners in Iowa won the nomination in '96 and 2000.
.
Go check the betting lines tonight.
It is all in motion, and swinging to Cruz.