The current story in U.S. manufacturing shows that an economy can look strong and remain so without adding workers. President Donald Trump arrived in Detroit on Tuesday to celebrate what he called a historic manufacturing revival, boasting that “investment is booming” and turbocharging growth. But the auto industry’s supposed recovery has yet to show up where it matters most for workers: payrolls. Manufacturing jobs, including in the automotive sector, have declined every month since Liberation Day, accor ...