PORTLAND, Ore. – As a lay liturgical minister and a cantor, Wilma Hens was a leader at for years at her Roman Catholic parish in the central Oregon city of Bend. But then Bishop Robert F. Vasa issued a two-page "affirmation of faith." It tells lay ministers and cantors that, if they want to continue in their roles on the altar, they must accept the church's teachings opposing abortion, contraception, gay relationships and other issues. Hens couldn't agree, so she quit, publicly. She stood at a microphone at St. Francis of Assisi Church last month and told the congregation she...