A piece of advice if you’re meeting with Lisa Su: Wear sneakers.Su, the leader of AMD, moves fast these days, though I suspect that’s always been the case. Her company's chips underpin the artificial intelligence that’s changing the world at breakneck speeds. To hear Su and literally everyone else in semiconductors talk about it, the US is in an AI race with China—and the rules keep changing. The Trump administration has once again shifted its stance on what kind of chips can and can’t be shippe...