The problem, Sister, IS the Constitution. Any document which claims the source of its authority is "we, the people", is bound to fail. All true authority comes from God, as taught through His Holy Church. The Americanist notions of "religious liberty" and "separation of Church and state" have been repeatedly condemned as erroneous and dangerous to the faith, as well as the common good. Until our Constitution is amended to reflect Christ's kingship, this unity you seek is nothing more than a pipe dream.