Well lets be real the only state that Ted Cruz has a chance at is Iowa. Trump is blowing out every other state. So its going to a one shot deal if the evangelicals go for Cruz. Trump is going to take NH, SC the SEC, FL, NV, NC and on from there.
If Cruz wins Iowa, it will quickly become a two man race everywhere. I doubt Cruz wins New Hampshire but I expect him to pull ahead of Trump throughout the South. Then I expect Trump to crash his own campaign since he seems to lose it when he faces any serious threat to his winning the election.