A federal judge questions the Trump administration on implementation plans for controversial birthright citizenship executive order as advocacy groups file class action lawsuits in response.

Steve Lubet, professor emeritus at the Northwestern University Pritzker School of Law, told NPR that the agency’s guidance gives officials “wide discretion” in determining who it wants to go after. While the process historically focused on people who had lied about their background to obtain U.S. citizenship, the new memo has much broader criteria.

The Trump administration’s Justice Department has issued a far-reaching directive instructing prosecutors to aggressively pursue denaturalization proceedings against immigrants who have become American citizens but have criminal records.