A Supreme Court decision on Friday striking down President Trump’s sweeping global tariffs dealt a major blow to his economic agenda and brought new uncertainty to global markets struggling to adapt t...

The Supreme Court dealt a major blow to President Donald Trump on Friday, ruling that he does not have the authority to impose the sweeping tariffs that have been a cornerstone of his economic agenda.

The Court ruled 6–3 that he lacked authority to impose such tariffs under emergency powers.