Mine is abortion. I think a woman's body is hers to do with as she pleases. I don't think men have any right to tell women what they can do with their bodies.
That includes the decision whether or not to give birth. Only the woman really knows who the father is anyway, and if she is promiscuous she might not know without a DNA test.
There are sociological, religious, political and psychological issues galore concerning abortion, but ultimately I dont see whether the decision to continue a pregnancy is anybody's business except the mother's.
McCain is upfront enough to say he wants to repeal Roe vs. Wade and take away a woman's right to abortion.
Sorry, John, but that crosses my vote/no vote line, and I hope you never are elected President of the United States.
This is just one example of a threshold election issue for me. Another is gun control. I won't vote for a candidate who tries to penalize or restrict law abiding citizens for owning firearms.
So without arguing any of the many issues since we're bound to disagree on some of them, what are your flashpoint election issues that would cost a candidate your vote if he/she supported them?