Oregon Attorney General Ellen Rosenblum had asked a federal judge to stop Department of Homeland Security agents and U.S. Marshals from detaining or arresting people without identifying themselves and without probable cause, a warrant or any explanation.

U.S. District Judge Michael Mosman on Friday denied the temporary restraining order she sought, saying the state had failed to prove it had any business suing the U.S. in the first place. Oregon had to show it had standing to sue on behalf of the protesters, defending people who can’t protect themselves, he wrote, and hadn’t.

The ruling probably means the end of the lawsuit and could make it harder for local officials elsewhere to resist deployments of federal agents, said Stanford Law School professor David Sklansky.

It “could help persuade a federal district court in another state that it made sense to do what the Oregon federal court did,” Sklansky said.