I don’t buy it. What do they mean by “Pro-Choice”? The poll is only as good as its definitions for the terms.
Many people are “Pro-Life”, but if pressed by strangers saying “Does that mean you want raped women and victims of incest to suffer?”, then they get skittish and back off.
Most Americans think abortions should be regulated and controlled, anything that says otherwise is a push poll.
Exactly. Ask Americans if they consider themselves pro-life and a majority will answer yes. Ask Americans if they think abortion should be illegal and a majority will answer no. So what we have is a majority of Americans who would not themselves get an abortion but don't necessarily believe it should not be an option. The classic "I'm totally pro-life (until something really bad happens that I didn't plan for and then I'll be glad I can do something about it).
(Or when pressed by fear-mongers to vote for an open pro-abort like Mitt, then they get skittish about their pro-life convictions, back off, and forever are lost to holding their candidates' pro-abortion posturing to the fire)