Democratic presidential nominee and former US vice-president Joe Biden leaves St Joseph on the Brandywine Roman Catholic Church with his granddaughter Finnegan Biden  after attending Sunday Mass in Wilmington, Delaware, on October 25th, 2020. Photograph: Angela Weiss/AFP/Getty

The nomination of Amy Coney Barrett to the US Supreme Court has provoked much discussion, and a key question is whether her Catholic moral beliefs wil(...)