Mark Galli recently set off a Twitter war and a media feeding frenzy for his editorial in Christianity Today, of which Galli is editor-in-chief, arguing for the removal of President Donald Trump. While Trump labled CT a “far-left” magazine, it is in fact the National Review of conservative Protestants. Galli is also the author of a number of books. His most recent, Karl Barth for Evangelicals, is the topic of our conversation.