"At this moment, as a proud representative voice of the Catholic and political left, it is clear as day that the political left has lost the ability to explain itself to a majority of the American people. I often say that there is no problem that would not be made better if given the leaven of Catholic social doctrine."

Maybe the "Catholic and political left" explained itself too well and its quasi-socialism and moral relativism has been rejected by the people. Perhaps you should focus more on Catholic moral doctrine and not just on your own narrow interpretation of her social doctrine.