A second federal court blocked the bulk of President Trump's tariffs on Thursday, ruling he cannot claim unilateral authority to impose them by declaring emergencies over trade deficits and fentanyl.

The ruling from U.S District Judge Rudolph Contreras, an appointee of former President Obama who serves in the nation's capital, comes hours after the U.S. Court of International Trade similarly blocked a series of Trump's tariff announcements.

DEVELOPING.