An ongoing Department of Commerce investigation into whether China is circumventing tariffs on its solar energy products is slowing the expansion of solar power capacity in the U.S., according to industry and outside experts. “In the blink of an eye, we’re going to lose 100,000 American solar workers and any hope of reaching the president’s clean energy goals,” Abigail Ross Hopper, president and CEO of the Solar Energies Industry Association (SEIA), said in a statement late last month. On March 25, James Maeder, the deputy assistant secretary of commerce for anti-dumping and countervailing duty operations, announced an investigation into whether...