Experts call Trump's raft of tariffs "worse than the worst-case scenario." There's been a pause and exemptions -- with things moving fast, here's what to know.

Gov. Gavin Newsom on Wednesday is expected to announce a lawsuit arguing that President Trump lacks the authority to enact the international tariffs without the support of Congress.

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,