Senator Lisa Murkowski joined congressional Democrats on Friday in filing a brief with the Supreme Court challenging President Donald Trump’s authority to impose tariffs.

“When the President wishes to impose tariffs, he must comply with the existing, lawful delegations of tariff power that Congress has enacted or, if he finds those authorities insufficient, ask Congress for new authority. Here, however, the President has usurped Congress’s constitutional authority by impermissibly using the International Emergency Economic Powers Act,” attorneys for the members of Congress wrote.

Why It Matters

The court has agreed to hear two cases related to Trump’s ability to authorize tariffs under the International Emergency Economic Powers Act (IEEPA). In one case, Learning Resources and hand2mind

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