Pope John Paul II and President Bush during their first meeting at the Pontiff's summer residence in Castel Gandolfo, near Rome, in July 2001. (AP Photo / Arturo Mari) No one would mistake John Paul II for an evangelical Protestant. But he contributed to a dramatic warming of relations between evangelicals and Catholics that may mark a turning point not only in American politics but in the history of Christianity. DURING THE 1960 presidential campaign, leaders of the National Association of Evangelicals - including Harold John Ockenga of Boston's historic Park Street Church - joined other Protestants in warning the nation...