Take partial-birth abortion, a gruesome procedure in which the fetus is delivered feet-first, its skull punctured and its brain suctioned out, thereby killing the fetus and collapsing the skull for easy delivery of the full body. Although he was not in the U.S. Senate when it voted to ban partial-birth abortions, Obama has nevertheless heavily criticized the legislation and the Supreme Court ruling that upheld its constitutionality. "Some people argue that the federal ban on abortion was just an isolated effort aimed at one medical procedure -- that it's not part of a concerted effort to roll back the hard-won rights of American women. That presumption is also wrong," Obama told those attending a 2007 Planned Parenthood meeting. But Americans overwhelmingly oppose partial birth abortion -- 70 percent in a 2003 Gallup poll -- so Obama's views put him in a distinct minority.
http://www.ceousa.org/content/view/609/68/
Anyway, I will let the interested reader read the rest of the links on that page I noted above (repeated here):
http://www.catholicleague.org/obama&infanticide.php