WASHINGTON — Sen. Maria Cantwell and small-business owners from the Northwest spoke in front of the Supreme Court on Thursday to highlight how President Donald Trump’s signature trade policy has hurt their companies, as the justices set a date to hear arguments in November on the president’s authority to impose sweeping import taxes.

The Supreme Court announced Thursday it will consider two challenges to the legality of tariffs Trump has enacted on much of the world under the International Emergency Economic Powers Act, a law that had never before been used for such broad import duties. Standing between business owners from Wenatchee and Boise, Cantwell, D-Wash., said companies that rely on imported goods won’t be able to survive tariffs as high as 50% and can’t plan for the future amid t

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