Internet reports that Trump trade adviser Peter Navarro hit back on Fox News,"It's interesting to hear Musk talk about establishing a zero-tariff zone with Europe. He didn't understand the secret at all. And I think the key that the public needs to understand is that Musk is a car seller, and that is his core identity. "Previously, Musk publicly ridiculed Navarro: either he was conceited, or he had a brain problem and had nothing to achieve.