By Dietrich Knauth NEW YORK (Reuters) -Twelve U.S. states will ask a federal court on Wednesday to halt President Donald Trump's "Liberation Day" tariffs, arguing that he overstepped his authority by declaring a national emergency to impose across-the-board taxes on imports from nations that sell more to the U.

President Donald Trump growled at the world's largest retailer over the weekend, ordering it not to raise prices in response to his tariffs. After weeks of saber-rattling between the United States and China,

The curtain came down on the first phase of President Trump’s tariff and trade war earlier this week, when the U.S. announced a huge reduction in levies with China. Washington and Beijing agreed