Why not have a poll asking these questions—Do you support partial birth abortion? Have you actually seen a video of a partial birth or late term abortion—and do you approve of the practice?
Any polls, on any subject, can depend on what questions are asked.
I have not seen polls on partial birth abortion, but would hope that big numbers oppose that.
On the other hand, even many pro life people favor abortion in cases of rape and incest and life of the mother.
It does depend how questions are asked and what specific aspects of abortion are discussed.