Ever since President Trump began raising tariffs on goods from China during his first term, Chinese companies have raced to set up warehouses and factories in Southeast Asia, Mexico and elsewhere to bypass US tariffs with indirect shipments to the American market via other countries. But on Thursday, Trump took aim at all indirect American imports, which he blames for part of the $1.2 trillion US trade deficit. Trump imposed 40% tariffs on so-called transshipments, which will take effect in a week. And a senior administration official who briefed reporters said work was under way that could broaden considerably the definition of indirect shipments.