A coalition of Democratic-led states sued President Donald Trump on Thursday in the U.S. Court of International Trade, arguing that his newly imposed across-the-board tariffs are illegal.

The suit is led by the Democratic attorneys general from Oregon, New York, California and Arizona along with attorneys general from 18 other states.

They accused Trump of trying to “sidestep” a February Supreme Court ruling that overturned many of his tariffs by using a different statute, Section 122 of the Trade Act of 1974, as justification for new tariffs.

“The President is attempting to use an obscure law as a tool for his tariffs, and is yet again, going about it illegally,” California Attorney General Rob Bonta said in a statement.....

Trump turned to Section 122 after the Supreme Court struck down his original slate of widespread tariffs under the 1977 International Emergency Economic Powers Act. In a 6-3 ruling, the court determined there was nothing in the 1977 law to authorize Trump’s tariffs.