A specialized federal court in New York on Wednesday ruled that most of President Donald Trump’s tariffs — including those on Chinese goods — are illegal, upending negotiations with more than a dozen nations and creating fresh uncertainty for countless American businesses that depend upon foreign suppliers.

A US federal court has blocked President Donald Trump's sweeping global trade tariffs, in a major blow to a key component of his economic policies. The Court of International Trade ruled that an emergency law invoked by the White House did not give the president unilateral authority to impose tariffs on nearly every one of the world's countries.