A ruling against President Donald Trump could force his administration to seek new legal grounds for the tariffs|@WhiteHouse|X

The Supreme Court will hear arguments on Wednesday over the legality of President Donald Trump’s sweeping tariffs, a case that could reshape presidential authority and global trade. 

Lower courts previously ruled that Trump exceeded his powers by using a 1977 emergency law, the International Emergency Economic Powers Act (IEEPA), to impose tariffs on nearly every trading partner.

Businesses and 12 Democratic-led states have challenged the move, arguing that Congress alone has the authority to set tariffs.

President Trump, who has pressed the conservative-majority court to uphold his policy, argues the tariffs are vital for national security and economic leverage. The duties have generated about $89 billion since February. 

A ruling against Trump could force his administration to seek new legal grounds for the tariffs. Treasury Secretary Scott Bessent plans to attend the hearing, underscoring the case’s major economic stakes.