If the tension between China and Taiwan continues to worsen, the Chinese Communist Party has a trump card: it threatens to cut off the island’s exports, which include products from the pivotal chipmaker and Apple’s main supplier TSMC. Gina Chon for Reuters Breakingviews [Opinion]: Perhaps Americans would care about US House Speaker Nancy Pelosi’s visit to Taiwan if they knew that new Toyota production was at risk. [TSMC] plays an outsized role in the global economy, supplying Apple, Qualcomm, and other industrial giants with key components. It should be enough to make Americans – who generally remain uninterested – nervous……