Chinese spies are spreading throughout the United States as part of “a whole-of-society threat,” FBI Director Christopher Wray told lawmakers Tuesday. The problem is exacerbated by the “naivete” of U.S. academics who don’t recognize the intelligence collectors among them. “They’re exploiting the very open research-and-development environment that we have, which we all revere, but they’re taking advantage of it,” he said. “So, one of the things we’re trying to do is view the China threat as not just a whole-of-government threat but a whole-of-society threat on their end and I think it’s going to take a whole of-society response by...