Thomas L. Friedman: How Trump and Xi can both win their trade war

It is impossible to exaggerate what a dangerous cliff the U.S. and China are perched on today.If the current trade dispute tips over into a full-blown economic war — and that spreads to Chinese students and scientists being thrown out of America and American business executives out of China and that spreads to all the investments we’ve made in each other’s countries being ripped out — the world as we’ve known it for the last four decades is going to be replaced with