An immigration judge on Friday ruled that the Trump administration can deport Columbia University graduate student Mahmoud Khalil just a month after his arrest prompted national outrage and marked the start of the federal government’s broader crackdown on foreign students.

The Louisiana judge affirmed the Trump administration's controversial argument that Khalil's beliefs threaten national security and therefore justify his deportation.

“The court will sustain charge of removability," Judge Jamee Comans said.

Khalil, 30, has until April 23 to file for relief and can remain in the United States until then. A federal judge in New Jersey has also temporarily barred Khalil’s deportation while he fights a similar challenge there.

He addressed the court after the ruling and denounced the decision.

“There's nothing more important than due process and fundamental fairness. ... Neither of those principles were present today," he said. "I just hope that the urgency that you deemed fit for me are afforded to the hundreds of others who have been here without hearing for months."

His legal team said it will "continue working tirelessly until Mahmoud is free."

“Today, we saw our worst fears play out: Mahmoud was subject to a charade of due process, a flagrant violation of his right to a fair hearing, and a weaponization of immigration law to suppress dissent," his attorney, Marc van der Hout, said in a statement. "This is not over, and our fight continues."

The Department of Homeland Security and the White House did not immediately return requests for comment.

A spokesperson for Columbia University declined to comment.

Khalil, who helped lead student protests against the war in Gaza at the Ivy League school last year, was detained on March 8 by federal authorities at his university-owned apartment complex in New York City. He has since been in custody at a Louisiana immigration detention center.

The Trump administration has maintained publicly that it has the authority to deport Khalil — a 30-year-old green card holder —because he "led activities aligned to Hamas, a designated terrorist organization."