Nate Silver turns his prowess at poll analysis to abortion. Go read his analysis and spectate the graphs. His conclusion:
(B)e wary of analysts who try to take this complexity argument too far. It’s true that any snapshot of public opinion from a poll is imperfect. It is not true that if you scratch only under poll results deeply enough, you will discover the American people actually take a clear side on abortion. By any objective measure, the country is conflicted.
It seems that we pro-lifers might do well to address the conflict itself. In the last four decades, clearly, a lot of insistence or even persuasion hasn’t budged public opinion perceptibly.