EWTN.com - Mortal sin: "Mortal sin
Is it a mortal sin to vote for someone who is not 100% pro life and supports embryonic stem cell research? We don't hear about mortal sin in church very often. We appreciate the truth.
Answer by Judie Brown on 10/14/2008:
I cannot imagine that it would be a mortal sin, as long as you examined your reasons for casting that vote and did so with a clear conscience.
My personal choice would be to avoid voting for such a person.