The government today asked the Supreme Court to overturn an appeals court ruling that allowed the American Civil Liberties Union to challenge the constitutionality of a law that gives the government unprecedented authority to monitor international emails and phone calls by Americans, according to the American Civil Liberties Union (ACLU).

At issue is an appeals court ruling that allowed the ACLU’s case to move forward. It rebuffed Obama administration arguments that the case should be dismissed because the ACLU’s clients cannot prove their communications will be collected under the law, known as the FISA Amendments Act. The ACLU said it was disappointed by today’s request.