Amid all the hurly-burly of President Trump’s first weeks in office, let’s try to put the changes he’s making and the feathers he’s ruffling in a longer, 20-year perspective. Start off with his trademark issue, and one which clearly helped him win the 64 crucial electoral votes of Pennsylvania, Ohio, Michigan and Wisconsin: trade.

Twenty years ago, Bill Clinton’s administration was busy negotiating with China for normal trade relations. China’s economy was growing rapidly, its manufacturers were inexpensive and American firms looked with relish on a market of 1 billion customers with fast-growing incomes.