OAKLAND, CA – JUNE 20: A shipping container is offloaded from the Hong Kong based CSCL East China Sea container ship at the Port of Oakland on June 20, 2018 in Oakland, California. U.S. president Donald Trump has threatened to impose 10 percent tariffs on $200 billion of Chinese imports if China retaliated against his previous tariffs on $50 billion of Chinese imports. (Photo by Justin Sullivan/Getty Images)