Donald Trump frequently cited what he called China's "rape" of the U.S. economy during his 2016 campaign rallies, and as president put half of what China sells to the U.S. under tariffs during his second year in office. But the economic battle between the two largest economies in the world didn’t start with Trump and won’t end with him. How and why have U.S.-China relations sunk so low? And where are they headed? In Superpower Showdown, _Wall Street Journal_ reporters Bob Davis and Lingling Wei trace the route of the trade war from the early 1990s to the January 2020 signing of the phase one deal that signaled a temporary halt to economic hostilities.