Big quote: Jensen Huang just spent a week watching his company's valuation get hit by the threat of a Chinese open-weight model. His response was to go on the record defending it. Speaking to Axios in Fort Worth, Texas, at the opening of a new phase of the Wistron plant that builds Nvidia's AI infrastructure, the Nvidia CEO said American companies should "absolutely" be free to run Chinese models. "These Chinese models are excellent," he said. "Open-source models that are excellent should be used." Asked whether China could displace American labs, he was blunt: "Zero possibility." The timing is what…