WASHINGTON — President Donald Trump may seek to deport hundreds of thousands of immigrants who recently entered the United States under a two-year grant of parole, the Supreme Court decided Friday.

Over two dissents, the justices granted an emergency appeal and set aside rulings by judges in Boston who blocked Trump’s repeal of the parole policy adopted by the Biden administration.

That 2023 policy opened the door for Cubans, Haitians, Nicaraguans and Venezuelans to apply for entry and a work authorization if they had a financial sponsor and could pass background checks. By the time Biden left office, 530,000 people from those countries had entered the U.S. under the program.

Justices Ketanji Brown Jackson and Sonia Sotomayor dissented.

“The court plainly botched this,” Jackson wrote, adding that it should have kept the case on hold during the appeals.

Friday’s unsigned order is not a final ruling, but it is a strong sign that Trump’s order will be upheld. The majority would not have lifted the judge’s order if they thought her ruling was correct.

Assistant Homeland Security Secretary Tricia McLaughlin called the decision a victory for Americans.

“Ending the CHNV parole programs, as well as the paroles of those who exploited it, will be a necessary return to common-sense policies, a return to public safety, and a return to America First,” she wrote in a statement.

It was the second time in two weeks that the justices upheld Trump’s authority to revoke a large-scale Biden administration policy that gave temporary legal status to some migrants.

The first revoked program gave temporary protected status to around 350,000 Venezuelans who were in the United States and feared they could be sent home.

The parole policy allowed up to 30,000 migrants a month from the four countries to enter the country with temporary legal protection. Biden’s officials saw it as a way to reduce illegal border crossings and to provide a safe and legal pathway for carefully screened migrants.

The far-reaching policy was based on a modest-sounding provision of the immigration laws. It says the secretary of Homeland Security may “parole into United States temporarily ... on a case-by-case basis for urgent humanitarian reasons any alien” who is seeking admission.

Advocates for immigrants said the decision will devastate and unleash “widespread chaos” on the affected communities.

“The Supreme Court has effectively green-lit deportation orders for an estimated half a million people, the largest such de-legalization in the modern era,” said Karen Tumlin, founder and director of Justice Action Center.

Upon taking office, Trump ordered an end to “all categorical parole programs.” In late March, Department of Homeland Security Secretary Kristi Noem announced that the parole protection would end in 30 days.

But last month, U.S. District Judge Indira Talwani blocked DHS’ “categorical” termination of the parole authority. The law said the government may grant parole on a “case-by-case basis,” she said, and that suggests it must be revoked on a case-by-case basis as well.

On May 5, the 1st Circuit Court in a 3-0 decision agreed that a “categorical termination” of parole appeared to be illegal.

Three days later, Solicitor General D. John Sauer filed another emergency appeal at the Supreme Court, arguing that a judge had overstepped her authority.

The parole authority is “purely discretionary” in the hands of the DHS secretary, he wrote, and the law bars judges from reviewing those decisions.

While the Biden administration “granted parole categorically to aliens” from four countries, he said the Boston-based judges blocked the new policy because it is “categorical.”

He accused the judges of “needlessly upending critical immigration policies that are carefully calibrated to deter illegal entry, vitiating core Executive Branch prerogatives, and undoing democratically approved policies that featured heavily in the November election.”

Immigrants rights advocates had urged the court to stand aside for now.

Granting the administration’s appeal “would cause an immense amount of needless human suffering,” they told the court.

They said the migrants “all came to the United States with the permission of the federal government after each individually applied through a U.S. financial sponsor, passed security and other checks while still abroad, and received permission to fly to an airport here at no expense to the government to request parole.”

“Some class members have been here for nearly two years; others just arrived in January,” they added.

In response, Sauer asserted the migrants had no grounds to complain. They “accepted parole with full awareness that the benefit was temporary, discretionary and revocable at any time,” he said.

The Biden administration began offering temporary entry to Venezuelans in late 2022, then expanded the program a few months later to people from the other three countries.

In October of last year, the Biden administration announced that it would not offer renewals of parole and directed those immigrants to apply to other forms of relief, such as asylum or temporary protected status.

It’s unclear exactly how many people remained protected solely through the parole status and could now be targeted for deportation. It’s also not clear whether the administration would seek to deport many or most of these immigrants.

Parolees who recently tried to adjust their legal status had hit a roadblock.

In a Feb. 14 memo, U.S. Citizenship and Immigration Services announced it was placing an administrative hold on all pending benefit requests filed by those under the parole program for Cubans, Haitians, Nicaraguans and Venezuelans, as well as a program for Ukrainians and another for family reunification.

The memo said the federal agency needed to implement “additional vetting flags” to identify fraud, public safety or national security concerns. But on Wednesday, a federal judge in Massachusetts ordered the Trump administration to lift the hold.

The DHS memo said the government could extend the parole for some of them on a case-by-case basis. But Trump’s lawyers said migrants who were here less than two years could be deported without a hearing under the “expedited removal” provisions of the immigration laws.

Talia Inlender, deputy director of the Center for Immigration Law and Policy at the UCLA School of Law, said the government should not be allowed to strip people of lawfully granted legal status without sufficient reason or notice.

Inlender, who defended the program against a challenge from Texas in 2023, said she expects swift individual legal challenges to the Trump administration’s use of expedited removal.

“So many people’s lives are on the line,” Inlender said. “These people did everything right — they applied through a lawful program, they were vetted. And to pull the rug out from under them in this way should be, I think, offensive to our own idea of what justice is in this country.”

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