Fact-checking Trump’s threat to take away Rosie O’Donnell’s U.S. citizenship

This article originally appeared on PolitiFact.

CORRECTION: PolitiFact corrected the date of President Donald Trump’s post on Rose O’Donnell.

President Donald Trump is threatening to strip people of their U.S. citizenship, including political foes, as his administration works to deport people from the country in mass numbers. On July 12, he said he was considering revoking comedian Rosie O’Donnell of her constitutional citizenship right — something no president can do.

READ MORE: Trump says he’s considering ‘taking away’ comedian Rosie O’Donnell’s U.S. citizenship

Trump has also threatened to rescind former White House adviser Elon Musk and New York City Democratic mayoral candidate Zohran Mamdani’s citizenship. Musk and Mamdani were born outside of the country and received U.S. citizenship through a legal process. The process of stripping them of citizenship is known as denaturalization.

Unlike O’Donnell, who was born in the U.S., the government can strip naturalized citizens of their citizenship under limited circumstances and after a legal process.

The Trump administration wants to pursue more of these cases, though political differences with Musk or Mamdani would not be grounds for denaturalization. Trump’s Justice Department issued a June memo directing attorneys to prioritize denaturalization cases. The memo’s list of priority categories included people who pose national security concerns and gang members and a catchall category for “any other cases referred to the Civil Division that the Division determines to be sufficiently important to pursue.”

The memo does not apply to citizens born in the U.S. In 1967, the U.S. Supreme Court ruled that under the citizenship clause of the 14th Amendment, they may only lose their citizenship by voluntarily relinquishing it.

“Once you have American citizenship, you have a constitutional entitlement to it,” said Eugene Volokh, a UCLA law professor. “If you like your American citizenship, you can keep your American citizenship — and that’s with the Supreme Court’s guarantee.”

It’s not just Rosie O’Donnell. Trump cannot revoke the citizenship of a person born in the U.S.

Protesters stand next to President Donald Trump’s star on the Hollywood Walk of Fame to denounce him for threatening to strip comedian Rosie O’Donnell of her citizenship, in Los Angeles on July 14, 2025. Photo by Daniel Cole/ Reuters

In a July 12 Truth Social post, Trump said O’Donnell’s U.S. citizenship “is not in the best interests of our Great Country” and he called her a “Threat to Humanity.” O’Donnell moved to Ireland following Trump’s re-election and said she’s seeking Irish citizenship. (Her grandparents were born there.)

Trump and O’Donnell have had a contentious relationship since 2006. O’Donnell has publicly criticized Trump and his policies, and Trump has insulted O’Donnell and her appearance.

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Their disagreements have no bearing on her U.S. citizenship. The president cannot strip a U.S.-born person’s citizenship because of personal or political disagreements, legal experts said.

“The Supreme Court has been very clear that native-born U.S. citizens cannot have their citizenship stripped by the government under any circumstances,” said Cassandra Burke Robertson, a Case Western Reserve University law professor who studies denaturalization.

Robertson cited a 1958 U.S. Supreme Court case involving a U.S.-born soldier who escaped from a U.S. Army enclosement in Morocco before surrendering to the U.S. Army the next day. The soldier was dishonorably discharged and stripped of his U.S. citizenship.

The Supreme Court ruled that it was unconstitutional to strip the U.S. soldier of his citizenship, calling it a “a form of punishment more primitive than torture.”

U.S.-born citizens can voluntarily renounce their U.S. citizenship.

According to immigration law, there are certain acts a U.S. citizen can take that when “performed voluntarily and with the intention of relinquishing U.S. nationality” may lead to a loss of U.S. citizenship.

These acts include serving in the armed forces of another country “engaged in hostilities against the United States,” accepting employment with a foreign government if it requires a declaration of allegiance to that country or formally renouncing U.S. citizenship at a consulate.

Being convicted of treason against the U.S. or attempting to overthrow the U.S. government by force, if those acts were done with the intention of relinquishing U.S. citizenship, can also lead to a loss of citizenship for U.S. born people.

How naturalized U.S. citizens can lose their U.S. citizenship

Elon Musk speaks with then-President-elect Donald Trump and guests at a viewing of the launch of the sixth test flight of the SpaceX Starship, in Brownsville, Texas, on Nov. 19, 2024. File photo by Brandon Bell/ Pool via Reuters

Though limited, there are two ways naturalized U.S. citizens can lose their citizenship. Neither method lets the president revoke citizenship based on political differences.

Trump said he would “have to take a look” when asked whether he would consider denaturalizing Musk, who feuded with Trump over his signature spending bill. Musk was born in South Africa and became a U.S. citizen in 2002.

Trump also baselessly questioned Mamdani’s citizenship saying, “A lot of people are saying he’s here illegally,” and asserting his administration would “look at everything.” Mamdani, who was born in Uganda, became a U.S. citizen in 2018. Rep. Andy Ogles, R-Tenn., called for the Justice Department to initiate denaturalization proceedings against Mamdani.

The executive branch cannot denaturalize people, Michelle Mittelstadt, communications director for the nonpartisan Migration Policy Institute, said.

“Denaturalization is exceedingly rare and has occurred for people who concealed information of war crimes, Nazi membership, criminal histories, or immigration fraud such as using a stolen identity,” she said.

The U.S. government can charge people with naturalization fraud, meaning they secured their citizenship through fraud or wilful misrepresentation or they didn’t meet eligibility requirements. If convicted, a person’s citizenship is automatically revoked.

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These are criminal cases in which defendants are entitled to an attorney, Robertson said. There’s a 10-year statute of limitations and the government has the burden of proof beyond a reasonable doubt, she said.

The second way the government can seek to denaturalize a person is through a civil action. In these cases, the government says the person “illegally procured” citizenship, meaning they didn’t meet eligibility requirements.

This process, which is more commonly used by the government, “lacks many constitutional protections,” Robertson said. People don’t have the right to a court appointed lawyer, there’s no statute of limitation, no jury trial, and a lower burden of proof.

The Justice Department’s June memo calls for these types of procedures.

PolitiFact chief correspondent Louis Jacobson contributed to this report.