Democratic Congressional lawmakers cheer for and some Republican members agree with the Supreme Court’s Friday ruling striking down President Donald Trump’s sweeping tariffs enacted last April. GOP. “The International Emergency Economic Powers Act authorizes the President to ‘regulate importation or exportation’ during a declared national emergency,” the justices said. “Nothing in IEEPA’s text mentions tariffs, duties, or taxes.” The 6-3 decision held that the IEEPA does not authorize the imposition of tariffs during peacetime without clear congressional authorization, reaffirming that tariff powers belong to Congress.