WASHINGTON — A federal judge agreed on Friday to temporarily block the Trump administration’s efforts to expand fast-track deportations of immigrants who legally entered the U.S. under a process known as humanitarian parole — a ruling that could benefit hundreds of thousands of people.

U.S. District Judge Jia Cobb in Washington, D.C., ruled that the Department of Homeland Security exceeded its statutory authority in its effort to expand “expedited removal” for many immigrants. The judge said those immigrants are facing perils that outweigh any harm from “pressing pause” on the administration’s plans.

The case “presents a question of fair play” for people fleeing oppression and violence in their home countries, Cobb said in her 84-page order.

“In a world of bad options, they played by the rules,” she wrote. “Now, the Government has not only closed off those pathways for new arrivals but changed the game for parolees already here, restricting their ability to seek immigration relief and subjecting them to summary removal despite statutory law prohibiting the Executive Branch from doing so.”

Fast-track deportations allow immigration officers to remove somebody from the U.S. without seeing a judge first. In immigration cases, parole allows somebody applying for admission to the U.S. to enter the country without being held in detention.

Immigrants’ advocacy groups sued Homeland Security Secretary Kristi Noem to challenge three recent DHS agency actions that expanded expedited removal. A surge of arrests at immigration courts highlights the lawsuit’s high stakes.

The judge’s ruling applies to any non-citizen who has entered the U.S. through the parole process at a port of entry. She suspended the challenged DHS actions until the case’s conclusion.

Cobb said the case’s “underlying question” is whether people who escaped oppression will have the chance to “plead their case within a system of rules.”

“Or, alternatively, will they be summarily removed from a country that — as they are swept up at checkpoints and outside courtrooms, often by plainclothes officers without explanation or charges — may look to them more and more like the countries from which they tried to escape?” she added.