NEW YORK — Illinois is among a dozen states that sued the Trump administration in the U.S. Court of International Trade in New York on Wednesday to stop its tariff policy, saying it is unlawful and has brought chaos to the American economy.

The lawsuit said the policy put in place by President Donald Trump has left the national trade policy subject to Trump’s “whims rather than the sound exercise of lawful authority.”

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It challenged Trump’s claim that he could arbitrarily impose tariffs based on the International Emergency Economic Powers Act. The suit asks the court to declare the tariffs to be illegal, and to block government agencies and its officers from enforcing them.

A message sent to the Justice Department for comment was not immediately returned.

The states listed as plaintiffs in the lawsuit were Oregon, Arizona, Colorado, Connecticut, Delaware, Illinois, Maine, Minnesota, Nevada, New Mexico, New York and Vermont.

“International trade is essential to states’ economies, and the administration’s tariffs will make it more difficult for our residents to purchase the basic goods they need at affordable prices,” Illinois Attorney General Kwame Raoul said in a statement. “I am proud to join my colleagues in fighting to prevent hardworking Americans from footing the bill for the Trump administration’s unlawful tariffs.”

In a release, Arizona Attorney General Kris Mayes called Trump’s tariff scheme “insane.”

She said it was “not only economically reckless – it is illegal.”

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The lawsuit maintained that only Congress has the power to impose tariffs and that the president can only invoke the International Emergency Economic Powers Act when an emergency presents an “unusual and extraordinary threat” from abroad.

“By claiming the authority to impose immense and ever-changing tariffs on whatever goods entering the United States he chooses, for whatever reason he finds convenient to declare an emergency, the President has upended the constitutional order and brought chaos to the American economy,” the lawsuit said.

Last week, California Gov. Gavin Newsom, a Democrat, sued the Trump administration in U.S. District Court in the Northern District of California over the tariff policy, saying his state could lose billions of dollars in revenue as the largest importer in the country.

White House spokesperson Kush Desai responded to Newsom’s lawsuit, saying the Trump administration “remains committed to addressing this national emergency that’s decimating America’s industries and leaving our workers behind with every tool at our disposal, from tariffs to negotiations.”