Katherine Kelaidis Katherine Kelaidis, a research associate at the Institute of Orthodox Christian Studies in Cambridge, England, is the author of "Holy Russia? Holy War?" and the forthcoming "The Fourth Reformation." By this Author Aug 12, 2025 With new Vatican ambassador, Trump sends culture-war message to American CatholicsBy actively undermining progressive and moderate faith voices at home, the White House is profligately deepening divisions in American religion.