That was the subject of my radio interview on Issues Etc., yesterday.
Summary: Pro-lifers can make a moral impact by legislating to protect as many lives as we can given the judicial restrictions currently imposed on us. “The wise statesman,” writes Harry Jaffa, “will act to achieve the greatest measure of justice the world in which he is acting admits.” Doing so does not constitute an illicit cooperation with an unjust law. It does not concede the legitimacy of any abortion. It does not collapse into moral relativism. Rather, it recognizes current legal and political obstacles and works within them to save as many lives as possible.
Meanwhile, Jivin J brought to my attention this National Review piece by Clark Forsythe and Dennis Burke. The authors convincingly explain why, given the current judicial climate, state human life amendments are not the best way to challenge Roe v. Wade.