Sorry, but even when Trump was leading in the polls in IA it was still a relatively close race within 5%. Cruz won IA by less than 4%. Trumps poll lead in NH was 15 and he won the state by 19.5. Depending on the poll, SC has Trump up 15+. You would have to have a massive poll shift in SC in the next two days for Trump to not win decisively.
I was thinking same. When Trump lost Iowa the polls right before were within the margin of error and pretty accurate.
New Hampshire was quite accurate and it looks like SC is the same as New Hampshire.