El Salvador's Bukele, meeting with Trump, says he won't return migrant wrongfully deported

El Salvador's President Nayib Bukele, sitting next to President Donald Trump in the Oval Office, said on Monday he will not return Kilmar Abrego García, a migrant from Maryland who was wrongfully deported.

"I don't have the power to return him to the United States," Bukele said when a reporter asked.

"How could I smuggle a terrorist into the United States?" he added, repeating the Trump administration's claim that Abrego García is a "terrorist" gang member of MS-13 -- which it has not claimed in the court battle over his fate.

Bukele, the self-described "world's coolest dictator" who has become a key partner in Trump's controversial deportations, called it a "preposterous question," saying "of course, I'm not going to do it," as Trump nodded in agreement.

Abrego Garcia's family and lawyer have denied he has any affiliation with the MS-13 gang. The administration has not publicly presented evidence that Abrego Garcia is a member of MS-13 or a terrorist, and he has not been charged with any crime or convicted.

Abrego Garcia was sent to El Salvador's infamous CECOT prison following what the government said was an "administrative error," despite a 2019 court order barring his deportation to El Salvador. His attorneys say he escaped El Salvador in 2011 due to political violence.

Benjamin Osorio, an attorney for Abrego Garcia, told ABC News that he has "very serious concerns" in response to Salvadoran President Bukele's remarks that he doesn't "have the power" to return the Maryland man to the U.S.

Osorio said that Bukele and President Trump are "both incentivized" not to bring Abrego Garcia back.

"Bukele's doing this because that's obviously what Trump wants, right?," Osorio said. "Because if they bring [Abrego Garcia] back, it's going to be a media frenzy, and this guy's gonna be all over the news, and then we'll know about his experience."

The Supreme Court last week ordered the Trump administration to "facilitate" the return of Abrego Garcia. Trump on Friday said, "If the Supreme Court said bring somebody back, I would tell them to do that. I respect the Supreme Court."

But Trump changed course a day later, instead suggesting the fate of those deported rested with Bukele.

And on Monday, Trump ignored a question on his statement that he would abide by the Supreme Court ruling, instead attacking the CNN reporter who asked about it.

His top officials repeated his claim that what happens next is solely up to El Salvador and that courts can't direct how the executive branch engages in foreign relations.

"It's up to El Salvador if they want to return him," Attorney General Pam Bondi said.

"I don't understand what the confusion is," said Secretary of State Marco Rubio. "This individual is a citizen of El Salvador. He was illegally in the United States and was returned to his country."

Bondi, Rubio and Stephen Miller, Trump's homeland security adviser, all pointed to the Supreme Court's order last week as a win for the administration in the ongoing legal dispute. (The administration is due to give a daily status update on Abrego Garcia later Monday and another hearing is set for Tuesday).

Miller falsely claimed the court ruled 9-0 that "neither Secretary of State nor the president could be compelled by anybody to forcibly retrieve a citizen of El Salvador from El Salvador."

But in fact, the Supreme Court held: "The Government should be prepared to share what it can concerning the steps it has taken and the prospect of further steps."

The Supreme Court also said, "The United States acknowl?edges that Abrego Garcia was subject to a withholding order forbidding his removal to El Salvador, and that the removal to El Salvador was therefore illegal."

The Trump administration has deported hundreds of migrants they allege to be Venezuelan gang members to El Salvador, though have done so with seemingly little due process. Rubio, in a social media post on Sunday, said the efforts continued with another 10 alleged criminals associated with MS-13 and Tren de Aragua deported to El Salvador

Rubio wrote that the "alliance" between Trump and Bukele "has become an example for security and prosperity in our hemisphere."

Trump and Bukele praised one another in their Oval Office meeting on Monday, touting their relationship. Trump called the Salvadoran president a "great friend" and Bukele said he was "very eager to help" the administration.

In addition to deporting alleged Venezuelan gang members, Trump and several officials have floated sending U.S. citizens convicted of violent crimes to the infamous El Salvador prison or other foreign prisons -- something legal experts have said would violate the Constitution.

"I'm all for it," Trump said of the idea on Monday.

"If it's a homegrown criminal, I have no problem. Now we're studying the laws right now … If we can do that, that's good," Trump said.

ABC News' Devin Dwyer and Jim Hill contributed to this report.