Thanks to all who have responded. I am a public policy major so it is good for me to learn about politics but also about God.
So lets start by looking at Church teaching:
The Church teaches that abortion or euthanasia is a grave sin. The Encyclical Letter Evangelium vitae, with reference to judicial decisions or civil laws that authorize or promote abortion or euthanasia, states that there is a “grave and clear obligation to oppose them by conscientious objection. …] In the case of an intrinsically unjust law, such as a law permitting abortion or euthanasia, it is therefore never licit to obey it, or to 'take part in a propaganda campaign in favour of such a law or vote for it’” (no. 73). Christians have a “grave obligation of conscience not to cooperate formally in practices which, even if permitted by civil legislation, are contrary to God’s law. Indeed, from the moral standpoint, it is never licit to cooperate formally in evil. …] This cooperation can never be justified either by invoking respect for the freedom of others or by appealing to the fact that civil law permits it or requires it” (no. 74).
Pope Benedict XVI
“No, you can never vote for someone who favors absolutely what’s called the ‘right to choice’ of a woman to destroy human life in her womb, or the right to a procured abortion,”
“You may in some circumstances where you don’t have any candidate who is proposing to eliminate all abortion, choose the candidate who will most limit this grave evil in our country, but you could never justify voting for a candidate who not only does not want to limit abortion but believes that it should be available to everyone”
Cardinal Burke
In considering “the sum total of social conditions,” there is, however, a certain order of priority, which must be followed. Conditions upon which other conditions depend must receive our first consideration. **The first consideration must be given to the protection of human life itself, without which it makes no sense to consider other social conditions. **“The inalienable right to life of every innocent human individual is a constitutive element of a civil society and its legislation” (Catechism of the Catholic Church, No. 2273).
Cardinal Burke
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Note that “proportionate reasons’] does not mean simply weighing a wide range of issues against abortion and euthanasia and concluding that they cumulatively outweigh the evil of taking an innocent life. Rather, for there to be proportionate reasons, the voter would have to be convinced that the candidate who supports abortion rights would actually do more than the opposing candidate to limit the harm of abortion or to reduce the number of abortions
Bishop Joseph A. Galante
There is only one thing that could be considered proportionate enough to justify a Catholic voting for a candidate who is known to be pro-abortion, and that is the protection of innocent human life. That may seem to be contradictory, but it is not.
"Consider the case of a Catholic voter who must choose between three candidates: candidate (A, Kerry) who is completely for abortion-on-demand, candidate (B, Bush) who is in favor of very limited abortion, i.e., in favor of greatly restricting abortion and candidate (C, Peroutka), a candidate who is completely against abortion but who is universally recognized as being unelectable.
"The Catholic voter cannot vote for candidate (A, Kerry) because that would be formal cooperation in the sin of abortion if that candidate were to be elected and assist in passing legislation, which would remove restrictions on, abortion-on-demand.
“The Catholic can vote for candidate (C, Peroutka) but that will probably only help ensure the election of candidate (A, Kerry). Therefore the Catholic voter has a proportionate reason to vote for candidate (B, Bush) since his vote may help to ensure the defeat of candidate (A, Kerry) and may result in the saving of some innocent human lives if candidate (B, Bush) is elected and introduces legislation restricting abortion-on-demand. In such a case, the Catholic voter would have chosen the lesser of two evils, which is morally permissible under these circumstances.”
Bishop Rene Gracida
What are “proportionate reasons”? To consider that question, we must first repeat the teaching of the church: The direct killing of innocent human beings at any stage of development, including the embryonic and fetal, is homicidal, gravely sinful and always profoundly wrong . . . .
What evil could be so grave and widespread as to constitute a “proportionate reason” to support candidates who would preserve and protect the abortion license and even extend it to publicly funded embryo-killing in our nation’s labs?
Certainly policies on welfare, national security, the war in Iraq, Social Security or taxes, taken singly or in any combination, do not provide a proportionate reason to vote for a pro-abortion candidate
Archbishop John J. Myers
What is a proportionate reason to justify favoring the taking of an innocent, defenseless human life? That’s the question that has to be answered in your conscience. What is the proportionate reason? . . . It is difficult to imagine what that proportionate reason would be
Cardinal Burke