This has been discussed extensively on the Alan Keyes threads. You can do a search here on FR, or go the Keyes' website, plus google, etc.
In his state, Obama voted against a bill that would have stopped a Doctor from finishing the job after a baby is "accidentally" born/survives an abortion procedure.
I think Obama argues that there's already a law on the books, but his argument seems disingenuous at best.
BTW, see the congressional testimony of Gianna (spelling?). The young lady who was "accidentally" born/survived when her mom was trying to have her killed in an abortion. You can do a search on th Infants Born Alive Act.
Thanks for the information!