[NYer]

"A well-formed Christian conscience does not permit one to vote for a political program or an individual law which contradicts the fundamental contents of faith and morals."

Faith in Jesus Christ, who is «the way, the truth, and the life»(Jn 14:6), calls Christians to exert a greater effort in building a culture which, inspired by the Gospel, will reclaim the values and contents of the Catholic Tradition. 
The Participation of Catholics in Political Life

In the Catholic tradition, responsible citizenship is a virtue; participation in the political process is a moral obligation.

Faithful Citizenship: A Catholic Call to Political Responsibility

Catholic Ping - let me know if you want on/off this list

[Aquinasfan]

The senator is aligned with his church on many social justice issues, including immigration, poverty, health care and the death penalty. But he diverges on the litmus issues, like abortion and stem cell research, that animate church conservatives and many in the hierarchy.

Because they're intrinsic evils, not prudential judgments regarding public policy.

Senator John Kerry's support for abortion rights and stem cell research has prompted discussions among Roman Catholic bishops and Vatican officials over how to respond to a presidential candidate who professes Catholicism while taking stands contrary to church teaching.

"Prompted discussions"?! What's to discuss? I will consider this NY Times spin... for now.