A dozen states have filed a lawsuit in the Court of International Trade, challenging President Trump’s tariff policy as unconstitutional and economically harmful.

The lawsuit claims that Trump's administration utilized the International Emergency Economic Powers Act (IEEPA) to impose tariffs without a valid national emergency, bypassing Congress, which has tariff-setting authority, according to CNN.

Plaintiff states include Oregon, Arizona, Colorado, Connecticut, Delaware, Illinois, Maine, Minnesota, Nevada, New Mexico, New York, and Vermont.

White House spokesperson Kush Desai justified the tariffs, claiming they were required to handle a "national economic emergency ", CNN reported.

The Justice Department has yet to respond.