On the afternoon that President Donald Trump promised "fire and fury" if North Korea launched an act of aggression, chief strategist Steve Bannon sat in his office and schemed about China, fuming about the country's trade practices and looking for retaliation. He seemed unconcerned with the North Korea situation, one person who spoke to him said, dismissing concerns around the nuclear weapon-wielding state as "just a lot of talk." It showed the deep divide between many of Trump's advisers and Bannon, who stayed laser-focused on promises scrawled onto his office wall, which he deemed the "War Room," and often took pride in clashing with many others around the president.