The Trump administration’s announcement of a new round of tariffs on Canadian goods may be less of a reprisal over trade barriers and more about gaining leverage in CUSMA negotiations, trade watchers suggest. Whether the measures are legal are not is open to debate, but that may not matter because for now they put Canada in a difficult position of whether to strike back and risk even further heightening the trade war or to try playing along with President Donald Trump’s game. On Monday, the White House invoked the never-before-used Section 338 of the Tariff Act of 1930, which allows...