President Donald Trump has threatened to pile an additional 40% tariff on any product that Washington determines to be “transshipped” through another country, a punishment aimed at stopping goods mainly from China dodging US duties.

The U.S. Court of Appeals for the Federal Circuit in Washington, D.C., will consider the legality of "reciprocal" tariffs that Trump imposed on a broad range of U.S. trading partners in April, as well as tariffs imposed in February against China,

As a sign of this unfairness they point to the fact that the U.S. buys more goods from many countries than these individual countries purchase from the United States, arguing that such bilateral trade deficits mean that the U.