I have had this discussion several times with other Christians - how could a Christian vote for a man who does not value the sanctity of life, has actually voted for infanticide & stands in direct opposition to other tenents of the Bible? God will ultimately judge, but I think a lot of people will have some explaining to do when Judgement Day arrives.
I am studying Graphic Design to paint and display this point. I call it political theology art. Reaching for the screen to vote, the hands of the voter become covered with the blood of the innocent. Pretty graphic, but hopefully it will get the point across.