Obama said America's greatest moral failure is its insufficient help to the disadvantaged. He noted that the Bible quotes Jesus as saying "whatever you do for the least of my brothers, you do for me."To Obama this means
"whatever government compels you to do for the least of my brothers, you do for me."Apart from his slander on America, Obama's misreading of Christ defines socialism.
McCain said the nation's greatest moral shortcoming is its failure to "devote ourselves to causes greater than our self-interests."That's piffle because it's untrue and double-piffle because were it true of government it would be a good, republican thing.
The right answer is
"America's greatest moral failure would be to elect a sophomoric bullshitter as President."