Trump dominates with second choices going well into the 50 percent range and beyond. Furthermore, Cruz's support in South Carolina only had 1/3rd of its voters claiming they had made up their mind before hand. 2/3rds decided on Cruz in the final days.
That means Cruz's support is soft and only a small portion represents a core support.
On the other hand, Trump's numbers in South Carolina, of it 2/3rds were solid Trump long before voting began.
Cruz won’t win but you are delusional. Trump has the highest negatives of any candidate they have measured.
He won’t be President.