A Harvard University student who was the first-ever recipient of the Deferred Action for Childhood Arrivals (DACA) program to win the Rhodes Scholarship, said he fears he will not be allowed to return to the U.S. if he leaves the country to further his education.

Jin Park, who lives in New York City, told The Associated Press that he fears he would not be allowed back in the country if he enrolls at the University of Oxford this fall due to President TrumpDonald John TrumpTrump campaign buys full page ads in Miami newspapers ahead of Dem debates Trump administration's 'forced diplomacy' with Iran isn't working Roy Moore trails Republican field in Alabama MORE’s decision to rescind overseas travel for those with DACA status.

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“If I leave, there’s a very real possibility that I won’t be able to come back. That’s the biggest fear for sure,” Park told the AP. “I haven’t really thought about what that’s going to mean if I’m not allowed back.”

Park immigrated to the U.S. with his family from South Korea when he was 7 years old.

He, along with hundreds of thousands of other “Dreamers,” are not subject to deportation because he entered the U.S. undocumented at a young age with his family.

To qualify for DACA, immigrants must have entered the country by 2007 and been under the age of 16 at the time of entry.

Trump’s decision to roll back the program has been challenged in multiple courts, but could be reviewed by the Supreme Court.

Park said he is aware of the risks associated with leaving the country to further his education but is “avoiding that question” of what will happen should he attempt to return. Park graduated from Harvard in December.

“I’m looking forward to having that unstructured time to think about these broader questions of who belongs in America and the value judgments we make about others,” he said. 

Park founded the nonprofit Higher Dreams in 2015 to help other Dreamers and students with permanent immigration status apply for college and seek out student loans.