Billionaire Elon Musk and president Donald Trump's honeymoon appears to be over. Musk lashed out at the architect of Trump's catastrophic tariff policy, which has ravaged international markets and stoked fears of an imminent recession. In a tweet, Musk took aim at Trump's advisor on trade and manufacturing, Peter Navarro, accusing him of having a PhD from Harvard. Navarro spent four months in jail last year for being in contempt of Congress. "A PhD in Econ from Harvard is a bad thing, not a good thing," the mercurial CEO tweeted, replying to a clip of Navarro telling CNN that the tariffs were […]