President Xi Jinping is scheduled to sit down with US President Donald Trump in Washington next week, and their planned summit looks to be closely watched as an indicator of the current state of ties between the world’s two largest economies. Economic issues appear poised to drive the agenda again, as they did when Trump travelled to Beijing in May with more than a dozen top American CEOs, including the heads of Tesla, Apple, Nvidia and Boeing. At stake are an extension of their current truce...