The Christian Century

Candidate John F. Kennedy:

If the time should ever come--and I do not concede any conflict to be remotely possible--when my office would require me to either violate my conscience or violate the national interest, then I would resign the office.

Supreme Court Justice Antonin Scalia:

If I thought that Catholic doctrine held the death penalty to be immoral, I would resign. I could not be a part of a system that imposes it.

Mark Silk:

What [Scalia] has done, then, is make his church's doctrine do the work that Kennedy assigned to his conscience, and in the process fibbed.

More.