President Trump talked about governing with the language of business and was receptive only to concrete talking points, getting lost in theoretical discussions, based on interviews with Belgian officials and sources involved in the meeting. He seemed to have “no idea” about economic issues facing Belgium and knew “even less” about the importance of Belgian trade to the United States. And, when he did have an idea about issues facing the European Union — of which Brussels is the de facto capital — those ideas seemed formed entirely on his experience building golf courses, the paper said.