Clinton is neither secular nor awkward about her faith. She cites her Methodist upbringing as a formative experience, with its emphasis on "preaching and practicing the social gospel." As a teenager in 1962, she heard and met the Rev. Martin Luther King Jr. in Chicago -- what would have been a profound experience for a spiritually alert youth -- and was later politically radicalized by his assassination. The likely Democratic nominee participates regularly in small-group Bible studies and is familiar with the works of Reinhold Niebuhr, Paul Tillich and Dietrich Bonhoeffer -- the theological heroes of mainline Protestantism (and of...