A momentous week in which the House of Representatives opened an impeachment inquiry against President Donald Trump overshadowed the announcement in New York that the United States and Japan had reached agreement on a mini trade deal. While its economic impact will be limited, the deal’s implications for the global trading system could be more significant—and not in a good way. The Trump White House is trumpeting the new U.S.-Japan deal as “phenomenal” and a big win for American farmers, but how big is it really? And is it enough for Japanese Prime Minister Shinzo Abe to sell at home? […]