As the U.S. grapples with the outbreak of COVID-19, former U.S. Trade Representative Robert Zoellick argues that the Trump administration should drop tariffs on Chinese medical products and work with other countries to remove growing restrictions on medical trade. The Treasury secretary, however, says he disagrees that the tariffs are contributing to a lack of key medical supplies. “Why would the U.S. increase the cost and difficulty of supplying protective gear to doctors and nurses? Why would Washington obstruct the...