US states sue Trump administration over new tariffs
Democratic attorneys-general say president exceeded authority after Supreme Court struck down original levies
Democratic attorneys-general say president exceeded authority after Supreme Court struck down original levies

US trade policy hinges on obscure laws after Supreme Court ruled previous levies illegal

Judges uphold ruling that the president exceeded his authority

Case could determine the future of the US president’s global trade agenda

Customs officials are rejecting attempts to reclaim duties that were struck down by the Supreme Court

US administration has other ways to hit trading partners with duties

About 40 briefs have been filed challenging signature policy ahead of showpiece hearing