NPR sued U.S. President Donald Trump on Tuesday over his recent executive order aiming to end federal funding for the outlet, a move that the lawsuit calls an illegal attack that “threatens the existence of a public radio system that millions of Americans across the country rely on for vital news and information.”

Colorado Public Radio, KSUT Public Radio, and Roaring Fork Public Radio joined NPR in filing the legal challenge, which also names White House Office of Management and Budget Director Russell Vought and Treasury Secretary Scott Bessent.

“The order is unlawful in multiple ways,” the lawsuit states. “It flatly contravenes statutes duly enacted by Congress and violates the Separation of Powers and the Spending Clause by disregarding Congress’ express commands. It also violates the First Amendment’s guarantees of freedom of speech and of the press.”