Evidently, Archbishop Wuerl got it wrong, as did the blessed Pope John Paul II before him. The threefold task of the bishop is actually to teach, to sanctify, and to deny Communion to pro-abortion politicians.
Or so it would seem from the comments of some people who today are not the Archbishop of Washington, nor even the Pope. As a service to them, I offer this image, which they may print, complete, and hang in their kitchen: