Indeed, all the popes in history – even the African popes of early Christendom – have come from north of the line.
And that is what the perception is by the American left, who hates Christendom.
Among them are the 96 members of the United States Senate, perhaps the windiest and most tedious group of men in Christendom.
Old English cristendom "Christianity, state of being a Christian," from cristen (see Christian) + -dom, suffix of condition or quality. The native formation, crowded out by Latinate Christianity except for sense "lands where Christianity is the dominant religion" (late 14c.). Similar formations in Scandinavian languages.