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,

President Donald Trump signed an executive order Thursday that would have new tariffs on a wide swath of U.S. trading partners to go into effect in seven days — the next step in his trade agenda that will test the global economy and alliances.