What explains Quinnipiac's unusually high poll numbers in favor of abortion? Quoting from its August 16 press release:
American voters continue to support the Roe v. Wade decision 62-32%, consistent with past poll findings.
It always depends who was asked:
From August 7-13, Quinnipiac University surveyed 1,545 American voters with a margin of error of +/- 2.5%, including 611 Republicans with a margin of error of +/- 4.0%, and 717 Democrats with a margin of error of +/- 3.7%.
Quinnipiac should rather have said, "American voters polled, 54% of whom were Democrat and 46% Republican, support the Roe v. Wade decision 62-32%, consistent with past poll findings."
Is it consistent? For Quinnipiac, it appears so. Its only other published political party breakdown from a May 2007 poll showed it asked then 51.5% Democrat and 48.5% Republican, which explains why answers were slightly more in line with other polls, although skewed left.
I called Quinnipiac and asked why it polled more Dems than Republicans. The spokesman said they do a straight demographic phone poll. They take responses from whoever picks up the phone until the quota is filled.