The problematic premise upon which this piece is based: Some Catholic Preliminaries to the Presidential Campaign by Fr. C. John McCloskey.
There is no common good because we do not live in a political community but in a unitary nation-state which replaced the federation of states that existed before Abraham Lincoln, a nation-state in which physical mobility, industrial capitalism, the growth of megapoleis, the creation of neo-Yankee "proposition nation" identity, and other causes have wrecked many local communities in which a true common good was instantiated.
If Opus Dei (of which Fr. McCloskey is a prominent American spokesman) cannot get its politics right, its take on lay spirituality will remain lacking. (And the advice of priests on American politics will be erroneous.)
Video Summary of Ordination of 32 Priests (Future Priests Talk About Their Priesthood)