California to Sue Trump Challenging His Authority to Impose Sweeping Tariffs

news.law April 17, 2025

California Gov. Gavin Newsom sued the Trump administration on Wednesday, challenging the president’s authority to impose sweeping tariffs that have set off a global trade war.

The lawsuit argues that President Donald Trump’s use of the International Emergency Economic Powers Act to impose tariffs on Mexico, Canada and China or a 10% tariff on all imports is unlawful. The act enables a president to freeze and block transactions in response to foreign threats but doesn’t allow the president to adopt tariffs, the suit says.

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