McCain scored points with conservatives here by acknowledging it was his first marriage . But when it came to the biggest moral failure of the U.S , he should have said it was abortion . Instead , he said not devoting ourselves to causes greater than our self - interest .

Question: What might have happened if McCain said abortion was the biggest moral failing of the U.S. ?
Answer: He would have acknowledged his first marriage .None of the above choices .He would have scored points .He would have devoted himself .