Nor would they want to be responsible for what is not in line with their principles.
But if they decided to stay home out of 'principle', they'll get a Democrat in the White House, which is even worse than any Republican they might reject out of principle. In a less precarious world, that might be ok, but there's WAY too much at stake. It's not abortion or homosexual marriage that is the major problem, it's standing virtually defenseless in the face of Islamic fundamentalism.