US court blocks Trump's tariffs, says president exceeded his authority

A U.S. trade court on Wednesday blocked President Donald Trump's tariffs from going into effect in a sweeping ruling that the president overstepped his authority by imposing across-the-board duties on imports from nations that sell more to the United States than they buy.

The Court of International Trade said the U.S. Constitution gives Congress exclusive authority to regulate commerce with other countries that is not overridden by the president's emergency powers to safeguard the U.S. economy.