When Japanese Prime Minister Sanae Takaichi meets US President Donald Trump in New York on Tuesday, the leader casting the longest shadow over the meeting will not even be in the building. Trump will meet Chinese President Xi Jinping in Washington on Thursday – two days after Takaichi meets the US leader on the sidelines of the United Nations General Assembly. It will be Xi’s first state visit to the US in over 10 years. Faced with an unpredictable American president eager for tangible results...