[grobdriver]

Follow the links in the article.
The poll surveyed 1,772 registered voters from January 30 to February 4 and had a margin of error of plus or minus 2.3 percentage points, Quinnipiac said.

1,772 people represent the entire population of the United States, don'cha know...

[Wyatt's Torch]

That’s actually a very large sample size. Compare it to Presidential polls where they used 700 or so. I have no issue with the sample size as it makes it statistically relevant. Now, is it a “representative” sample is the key question.