I collected the votes for every Mormon majority county in Idaho (Utah is majority Mormon, so I thought it could tell us what's coming)
Cruz: 25,181 (51.6%)
Rubio: 12,731 (26.1%)
Trump: 8,197 (16.8%)
Kasich: 2,695 (5.5%)
Percentages are of the four candidates only. It ends up pretty reflective of the poll actually. So, pretty much all the Rubio vote is transferring to Kasich and Trump is staying in third. It'll be even worse for Trump since its a caucus, too.
Another indicator, NV counties on the UT border (excluding Clark):
Cruz: 1283 (41.6%)
TRUMP: 854 (27.7%)
Rubio: 647 (21%)
Carson: 225 (7.3%)
Kasich: 57 (1.8%)
Bush: 9 (0.03%)
Paul: 8 (0.03%)
So, not as wide of a victory, but still a clear win for Cruz. If we take out the withdrawn candidates, it goes to:
Cruz: 1283 (58.5%)
TRUMP: 854 (38.9%)
Kasich: 57 (2.6%)
Which would be TRUMP's worst nightmare.