The Schumer-Graham proposal is one of Washington’s loudest shots yet in the increasingly tense Sino-American trade relations. The threat, of course, is that a deterioration in these relations could erupt into a full-on trade war, with each side imposing protectionist import restrictions on the other. If the actions of the past few weeks are any indication, the two countries are headed that way. On May 13, the US launched a virtual weeklong assault on China’s economic policies.