The National Catholic Register publishes a good issue by issue comparison by the two presidential candidates.
An excerpt.
“Abortion
"Pope Benedict XVI recently summed up the Church’s teaching: “The fundamental human right, the presupposition of every other right, is the right to life itself. This is true of life from the moment of conception until its natural end. Abortion, consequently, cannot be a human right — it is the very opposite. It is a deep wound in society.”
“John McCain
"Opposes the “Freedom of Choice Act” (FOCA), a bill which would prohibit states from placing limits on abortion.
"On Supreme Court: “Chief Justice [John] Roberts and Justice Samuel Alito would serve as the model for my own nominees.”
"In the U.S. Senate:
Voted YES, make unborn children eligible for the SCHIP health-care program.
Voted YES, keep federal money out of abortion.
Voted YES, use taxpayers’ money to kill human embryos in stem-cell research.
Voted YES, a parent must be notified when a minor gets out-of-state abortions.
Voted NO on promoting contraception to teens.
Voted YES, unborn victims of violence count.
Voted YES, ban partial-birth abortion.
Voted YES, ban abortion on military bases.
Voted YES on banning partial-birth abortions.
Voted YES on banning human cloning.
“Barack Obama
"Co-sponsored the “Freedom of Choice Act” (FOCA) and says his first act as president will be to prohibit states from placing any limits on abortion.
"On Supreme Court: Obama sharply criticized the Supreme Court for its 2007 decision upholding the Partial-Birth Abortion Ban Act.
"Voted to allow “live birth abortion” when the “Born-Alive Infants Protection Act” came up in the Illinois Senate.
"In the U.S. Senate:
Voted NO, don’t make unborn children eligible for the SCHIP health-care program.
Voted NO, parents needn’t be told if their children get abortions in other states.
Voted YES, use taxpayers’ money to kill human embryos in stem-cell research.
Voted NO, parent should be notified when their children get out-of-state abortions.
Voted YES on promoting contraception to teens.”