A federal judge in Seattle on Tuesday temporarily blocked President Donald Trump’s move to suspend the United States refugee admissions system, saying the executive branch cannot simply nullify a program created by Congress. The ruling puts an immediate brake on one of the administration’s most sweeping immigration steps, while leaving open the possibility of appeal and a fuller written opinion in the coming days.

U.S. District Judge Jamal Whitehead, appointed in 2023 by former President Joe Biden, heard arguments in a lawsuit filed by individual refugees and major refugee aid groups. The plaintiffs said the administration’s freeze had left people stranded overseas and had caused staffing cuts at organizations that help newly arrived refugees settle in the United States. Whitehead said the government’s actions amounted to an effective nullification of congressional intent, and told the parties that presidential power over admissions is broad but not unlimited.

The Trump administration argued that the refugee program fell squarely within presidential authority over who enters the country. Justice Department lawyer August Flentje said the White House could deny entry to foreigners if their admission would be detrimental to U.S. interests, and he urged the court not to treat the injuries claimed by refugee groups as irreparable harm. He also suggested the government could move quickly to appeal.

The order under review said refugee admissions should be suspended because cities and communities were strained by record migration and did not have the capacity to absorb more arrivals, including people fleeing war, persecution or natural disaster. The administration said about 600,000 refugees were being processed worldwide. The case has become the latest test of the line between presidential discretion over immigration and the power of Congress to set the structure of legal migration.

Whitehead said the record before him included refugees stranded in dangerous places, families separated after selling their belongings in advance of canceled travel, and resettlement agencies that had already laid off staff. That factual record, he said, presented the kind of harm that justified emergency court intervention. His written opinion, he said, would follow later.

The decision also underscores the political weight of the refugee program. It has long drawn bipartisan support as a vetted path for displaced people, but it has repeatedly become a flashpoint in the debate over immigration limits and executive power. Trump previously halted the program during his first term and later cut annual admissions sharply. Tuesday’s ruling suggests the courts may once again become a central referee in the fight over how far a president can go in suspending humanitarian entry programs.