Donald Trump is the kind of person who occasionally gets locked up in Xi Jinping's China. A boastful billionaire, someone who thinks he is bigger than the Party, bigger than the national project. Such a colossus can disappear to no known location for a period of quiet reflection with the help of the Communist Party's discipline enforcers, later to reappear muttering grateful homilies on what the Party has done for his business. As President Trump and President Xi prepare to meet in Beijing, the contrast between the leaders of the world's economic superpowers is stunning.