In this hardscrabble Rust Belt city with deep Catholic roots, the Catholic Church's top official is facing calls for his resignation over his handling of sexual abuse allegations against priests.

Cardinal Donald Wuerl, perhaps the most powerful Catholic cleric in the United States, acknowledged the disquiet and turmoil surrounding his leadership -- as well as the Catholic Church as a whole -- amid a wave of multi-state abuse-related investigations that has shaken the church to its core.

The Catholic Church is facing a reckoning today in large part due to a damning Pennsylvania grand jury investigation released last month.