 President Biden with his grandson Hunter after attending Mass last month at St. Joseph on the Brandywine Catholic Church in Wilmington, Del. (AP) Joe Biden is arguably the most observant U.S. president in decades and the nation's most prominent Catholic politician. He rarely misses Mass, he quotes scripture, and his faith has long been a core part of his identity. He's also a liberal, and that's stirring up the U.S. Catholic bishops fighting cultural battles within the church. By Matt Viser ● Read more » | 
