This thing is a month old and one the smallish surveys I've seen in long time if ever:
The survey of 278 Republican voters between Feb. 14 and Monday has a margin of error of 5.9 percentage points.
Yo are right. After his razor-thin losses in OH and MI, and his 51% win in AK, I guess he’s lead now over the others is in the stratosphere.
The first question was likely something along the lines, “do you support Santorum?”
If not, end of survey. The results are obtained from the people who supported Santorum.