President Donald Trump called for Rep. Ilhan Omar, D-Minn., to resign Thursday after a Justice Department court filing identified her by the name “Ilhan Nur Said Elmi, a/k/a Ilhan Abdullahi Omar,” reigniting scrutiny of her identity and past marriage.

Speaking at a rally in Iowa, Trump said the filing raised questions about the name Omar used when she ran for Congress and took the oath of office. He then declared that Republicans had effectively gained another seat in the House.

The document was submitted Wednesday in federal court in Washington as prosecutors sought to keep a search warrant for Omar’s residence sealed while authorities completed its execution. The filing came amid requests from The New York Times and other news organizations to make the warrant public.

However, the document does not establish that Omar used a fraudulent identity to win election or take office, and she has not been charged with a crime in connection with the allegations.

Omar’s office rejected reports questioning her name. A spokesperson said Ilhan Omar is her real name and described the allegations as a politically motivated smear intended to distract from the Trump administration’s record.

Reports citing sources familiar with the matter indicated that Omar’s congressional name may differ from her birth name. A source familiar with the investigation separately told the New York Post that Elmi was her original surname.

The name has drawn additional attention because Ahmed Nur Said Elmi, Omar’s former husband, shares the surname. The two married in 2009 and divorced in 2017.

For years, critics have alleged that Elmi was Omar’s brother, an accusation she has repeatedly denied. In 2016, she described the allegation as “absurd and offensive.”

During an interview Wednesday on MS NOW with Chris Hayes, Omar again rejected the accusation, calling it “insane.” Asked whether she was related to her former husband, she responded, “Not to my knowledge.” Trump referenced that answer during Thursday’s rally, suggesting it raised further questions.

Attorney General Todd Blanche, responding to questions from the New York Post about the court filing, said he did not believe prosecutors would invent names in official documents.

The controversy comes amid reports of a federal investigation involving Omar. According to the New York Post, Homeland Security Investigations agents searched her Washington residence on Oct. 12 and seized her phone, computer and passport. The newspaper also reported that federal prosecutors in Minnesota were examining whether she provided false information on immigration documents, including through interviews with relatives and the collection of DNA evidence.

Omar was born in Somalia, where her family fled the civil war in 1991. After spending four years in a refugee camp in Kenya, the family immigrated to the United States. Omar has said her birth certificate was destroyed.

The Justice Department filing and reports about the investigation have renewed political scrutiny of the congresswoman, but the allegations surrounding her identity and former marriage remain distinct from any proven criminal wrongdoing.