In an earlier post I referred to the chapter on abortion in David Freddoso's book, The Case Against Barack Obama. National Review Online has now posted the first part of that chapter, dealing with the Infants Born-Alive Act and Obama's opposition to it.
Also, Ross Douthat: "The Democratic Party's rigidly pro-choice stance is one of the more unyielding positions in contemporary American politics, and at least for the foreseeable future, pro-lifers who vote Democratic will always be casting votes that cut against their convictions on abortion, rather than with them."