Elon Musk says he doesn't agree with Peter Navarro's views on tariffs."A PhD in Econ from Harvard is a bad thing, not a good thing," Musk said of Navarro's background.Musk said he wants a "free trade zone" between Europe and the US.

Peter Navarro said on Sunday that Musk is "simply protecting his own interests" after the Tesla CEO spoke about Trump's new tariff policies.

On Air Force One on Thursday, President Trump said Elon Musk can stay "as long as he'd like," but he added there will be a point when "Elon's gotta have to leave."