Democrat lawmakers have joined Republicans in scolding Elon Musk for opening a Tesla showroom in Xinjiang, where China is accused of slavery and genocide against Uighur Muslims. In a rare showing of bipartisan agreement, two Democratic congressmen who oversee trade wrote to Musk demanding to know whether Tesla sourced its materials and products from forced-labour camps in Xinjiang. “Your misguided expansion into the Xinjiang Uyghur Autonomous Region sets a poor example and further empowers the (Chinese government),” Democrats Bill Pascrell and Earl Blumenauer wrote in a joint letter. They also questioned whether Tesla had a financial relationship with companies connected...