Attorneys general from 22 states and the District of Columbia sued President Donald Trump on Tuesday, just hours after he issued an executive order aimed at denying citizenship to U.S.-born children of unauthorized immigrants.

The first suit, filed in Massachusetts federal court, alleges that the order “unambiguously” violates the Fourteenth Amendment and infringes on congressional powers. At a news conference in San Francisco, California Attorney General Rob Bonta said the state plaintiffs hope to obtain a preliminary injunction blocking the order before it takes effect Feb. 19.