The video above shows a CNN report on Obama's opposition, in 2001 when he was an Illinois state Senator, to the Illinois state's Born Alive Infants Protection Act, a bill to give legal protection to live babies surviving abortions, so that they would not be thrown away and left to die.
Obama voted against Born Alive and was the only senator to speak against it on the senate floor for 2 consecutive years.
The federal version of Born Alive was approved unanimously 98-0 by the US Senate. It passed overwhelmingly, approved from left to right, in the US House of Representatives. President Bush signed it into law on August 5, 2002.
As chairman of the Illionois Senate Health & Human Services Committee, Obama stopped a bill with identical wording of the federal law from being introduced in Illinois in 2003.
The reason Obama had given for voting against the Illinois state's Born Alive Infant Protection Act was that this bill was different from the similar federal law that was passed, in that it was open to being interpreted as making all abortions illegal and did not protect Roe v. Wade.
The video report shows a debate on the issue between Democrat James Carville and conservative Bill Bennett.
As you can easily see in the video, only Bennett has a valid argument: the federal law and the Illinois bill are identical, so this is not about Roe v. Wade, this is not about abortion. It looks like one of Obama's many falsities.
Carville has no arguments at all, valid or not. All he does is using ad hominem attacks against Santorum, thinking that his socialist peers will find him funny, and against the nurse who supported the bill.
Imagine for a moment if this happened in a court of law: Bennett's statement would have been accepted, Carville's would have been rejected as argumentative.
It's easy to see why the best brains belong to the right end of the political spectrum. Since socialism of various shapes and forms is the current dominant ideological orthodoxy of the West, it takes more intellect - as well as guts - to challenge it than to go along with it.