UPDATED: Nov. 18th In light of the recent election, I've received some questions about Catholic politicians who oppose the faith and the question of Communion (for example, elected officials who support abortion or same-sex "marriage.") These are complicated questions, so here are some considerations. Is someone like Mr. Biden who opposes Church teaching in public office still Catholic? The short answer is, yes. There is a saying, "Once Catholic, always Catholic." It means that one is incorporated into the Catholic Church by virtue of baptism, and once baptized into the Church, that can not be changed. It is still possible for someone to renounce the Catholic faith of course (technical term: apostasy ) or refuse to follow the teachings and disciplines of the Church, or even to stubbornly contradict the truths of the Church (technical term: heresy ). This is a separate question from whether or not someone is Catholic. A good summary of thi...