In a position statement (probably from a few years ago) on the nature of marriage and its recognition and regulation by civil society (see "One Man, One Woman, For Life: Lead Messages on Marriage Redefinition"), the U.S. Conference of Catholic Bishops stated the following about "civil unions", etc.
This web log is a place to conduct a conversation on the elusive nature or features of listening to and following God’s will. That is, it is concerned with the “how and why” of seeing with Eyes of Faith. Besides the “how and why” it is also about the “what.” What does one see in the world through Eyes of Faith? This component of the weblog is, alas, likely to be the preponderant content for some time. Seeing with eyes of faith is ultimately about viewing the world as a creature of a personal God.