California Gov. Gavin Newsom said Wednesday that his state will file a lawsuit challenging President Donald Trump's authority to impose sweeping tariffs that have set off a global trade war. The suit will argue that Trump's use of the International Emergency Economic Powers Act to impose tariffs on Mexico,

President Donald Trump’s tariff exclusions for smartphones and other tech products have added to a growing set of confusing signals for companies and trading partners digesting how to engage a White House still promising to negotiate dozens of new deals in America’s favor.

A group of U.S. businesses filed a lawsuit Monday arguing that President Donald Trump’s tariffs are illegal under the International Emergency Economic Powers Act (IEEPA).