There is intense anticipation in the Catholic Church -- and no small amount of anxiety for traditionalists -- over what Pope Francis will say about Communion for divorced and remarried Catholics in a key document expected in the coming weeks. But Francis has already made an intriguing change in this area, albeit one that only concerns the Vatican's arcane diplomatic protocol and a very, very select group: Catholic heads of state. As longtime Vatican-watcher Andrea Tornielli reports, the pontiff has altered the long-standing Vatican custom that if a Catholic president or prime minister (or dictator) who is divorced and remarried...