"When the U.S. Supreme Court struck down Nebraska's partial-birth abortion ban in 2000, the decision was fueled, by some degree, by a statement made by ACOG (American Congress of Obstetricians and Gynecologists). In it, the group announced its sudden support for the procedure, writing that the partial-birth procedure "may be the best or most appropriate procedure in a particular circumstance to save the life or preserve the health of a woman." What no one knew at the time is that the first draft of ACOG's statement said the exact opposite. The organization planned to say that it "could identify no circumstances under which the [partial-birth] procedure... would be the only option to save the life or preserve the health of the woman."
What changed between the first and final versions? Well, the science certainly didn't--but the level of White House involvement did