WASHINGTON, DC - OCTOBER 11:  U.S. President Donald Trump shakes hands with Chinese Vice Premier Liu He after announcing a "phase one" trade agreement with China in the Oval Office at the White House October 11, 2019 in Washington, DC.  China and the United States have slapped each other with hundreds of billions of dollars in tariffs since the current trade war began between the world’s two largest national economies in 2018. (Photo by Win McNamee/Getty Images)