That is the title of a brief essay I just published on moralaccountability.com. Here's how it begins:
President Barack Obama is unequivocal in his support of “abortion rights.” He has opposed laws forbidding the gruesome practice of partial-birth abortion, and even voted against Illinois’ born alive infant protection act, which protects babies who are born alive after surviving an attempted abortion. Despite Obama’s record, some prolife Catholics and Evangelicals supported the president’s candidacy on the grounds that his policies would reduce the number of abortions. Although my moralaccountability.com colleague Professor Michael New has provided convincing refutations of the empirical claim...made by Obama’s self-identified pro-life supporters, I want to respond to what I believe is the philosophical mistake that lurks behind their argument.
You can read it in its entirety here.