They frame their letter with the following:
1. Forming Consciences for Faithful Citizenship clearly teaches that not all issues have the same moral equivalence. Some issues involve "intrinsic evils"; that is, they can never under any circumstance or condition be morally justified. Preeminent among these intrinsic evils are legalized abortion, the promotion of same sex unions and "marriages", repression of religious liberty, as well as public policies permitting euthanasia, racial discrimination or destructive human embryonic stem cell research.They then make the following statement about abortion not being the only issue, but the defining moral one:
3. Therefore, we cannot make more clear the seriousness of the overriding issue of abortion – while not the "only issue" – it is the defining moral issue, not only today, but of the last 35 years. Since the Roe v. Wade decision in 1973, more than 48 million innocent lives have been lost. Each year in our nation more than one million lives are lost through legalized abortion. Countless other lives are also lost through embryonic stem cell research. In the coming months our nation will once again elect our political leaders. This electoral cycle affords us an opportunity to promote the culture of life in our nation. As Catholics we are morally obligated to pray, to act, and to vote to abolish the evil of abortion in America, limiting it as much as we can until it is finally abolished.They go on to talk about other issues and the moral weight of them in comparison to intrinsic evils.
4. As Catholics we are faced with a number of issues that are of concern and should be addressed, such as immigration reform, healthcare, the economy and its solvency, care and concern for the poor, and the war on terror. As Catholics we must be concerned about these issues and work to see that just solutions are brought about. There are many possible solutions to these issues and there can be reasonable debate among Catholics on how to best approach and solve them. These are matters of "prudential judgment." But let us be clear: issues of prudential judgment are not morally equivalent to issues involving intrinsic evils. No matter how right a given candidate is on any of these issues, it does not outweigh a candidate's unacceptable position in favor of an intrinsic evil such as abortion or the protection of "abortion rights."They state the following in conclusion:
To vote for a candidate who supports the intrinsic evil of abortion or "abortion rights" when there is a morally acceptable alternative would be to cooperate in the evil – and, therefore, morally impermissible.and this...
As Catholics, we must treat our political choices with appropriate moral gravity and in doing so, realize our continuing and unavoidable obligation to be a voice for the voiceless unborn, whose destruction by legal abortion is the preeminent intrinsic evil of our day. With knowledge of the Church's teaching on these grave matters, it is incumbent upon each of us as Catholics to educate ourselves on where the candidates running for office stand on these issues, particularly those involving intrinsic evils. May God bless you.