A Koch-backed conservative legal advocacy group filed a lawsuit against the Trump administration on Thursday over emergency tariffs imposed on China.

The New Civil Liberties Alliance (NCLA) filed the legal challenge to President Donald Trump’s “unlawful attempt” to impose tariffs on China under the International Emergency Economic Powers Act of 1977 (IEEPA). NCLA filed the lawsuit in federal court in Pensacola, Florida, on behalf of Simplified, a Pensacola-based company that purchases products from China.

“In its nearly 50-year history, no other president — including President Trump in his first term — has ever tried to use the IEEPA to impose tariffs. NCLA’s lawsuit does not quibble with President Trump’s declaration of an opioid-related emergency, but it does take issue with his decision to impose tariffs in response, without legal authority to do so,” NCLA said in a release.

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