While I'm of the opinion that either way this presidential election goes the US is essentially screwed, I feel it is still our responsibility to make our voices heard on behalf of that which is right.
Article of Faith 13 states..."If there is anything virtuous, lovely, of good report or praiseworthy, we seek after these things."
While I find just about nothing virtuous, lovely or of good report about John McCain, he does seem committed to defending the rights of the unborn and to the defense of the United States of America. And, as we learn from the example of Captain Moroni:
Alma 46:12 "And it came to pass that he rent his coat; and he took a piece thereof, and wrote upon it— 'In memory of our God, our religion, and freedom, and our peace, our wives, and our children' —and he fastened it upon the end of a pole.
13 And he fastened on his head-plate, and his breastplate, and his shields, and girded on his armor about his loins; and he took the pole, which had on the end thereof his rent coat, (and he called it the title of liberty) and he bowed himself to the earth, and he prayed mightily unto his God for the blessings of liberty to rest upon his brethren, so long as there should a band of Christians remain to possess the land—"
Apparently these were the issues that mattered most to Moroni and so they should be for us...the "band of Christians [that] remain to possess the land".
Please take a moment to review the Family Security Matters National Security voter's Guide.