A federal court in New York handed President Donald Trump a big setback Wednesday, blocking his audacious plan to impose massive taxes on imports from almost every country in the world.

United States and Oregon v. Department of Homeland Security – is quite broad. It argues that the Constitution places fairly strict limits on Congress’s ability to empower the president to impose tariffs in the first place — limits that Trump surpassed — and it reads several federal trade laws to place rigid constraints on Trump’s ability to continue his trade war.

A specialized federal court in New York on Wednesday ruled that most of President Donald Trump’s tariffs — including those on Chinese goods — are illegal, upending negotiations with more than a dozen nations and creating fresh uncertainty for countless American businesses that depend upon foreign suppliers.