A local immigrant advocacy group is taking on the Trump administration in court.

At a news conference Wednesday morning, the Border Network for Human Rights announced it’s joining a lawsuit filed in New Mexico federal court by the Southwest Environmental Center.

The Border Network is challenging the administration’s zero tolerance immigration policy and the now-halted practice of separating immigrant families in detention.

“Our challenge is based on the Administrative Procedure Act which establishes a requirement for notice and public comment before any government agency adopts a major new policy,” said attorney David Baake.

“The government should not adopt drastic new policies without giving the public an opportunity to weigh in,” Baake added.

U.S. Attorney General Jeff Sessions has defended zero tolerance, blaming previous administrations for allowing “loopholes” he believes have enticed undocumented immigrants to bring children with them to the country.