Homeland Security Secretary Markwayne Mullin said the department is investigating allegations surrounding Rep. Ilhan Omar’s immigration history, including a long-running claim that the Minnesota Democrat married her brother to help him enter the United States.

“We know that she married her brother to try to bring him to the United States,” Mullin said during an interview with Benny Johnson. He added that investigators are examining whether there could be additional immigration violations involving Omar’s family.

Mullin said the investigation remains ongoing and that any action against Omar would depend on investigators establishing that she violated federal law.

“If you lied about certain things about your application, there’s no expiration to that,” Mullin said. “If we can prove it, that you shouldn’t have been here in the first place, we’ll deport you.”

The allegation centers on Omar’s 2009 marriage to Ahmed Nur Said Elmi, a British citizen. Omar has repeatedly denied that Elmi was her brother and has rejected allegations that the marriage was arranged to facilitate immigration. The claim has circulated for years but has not been publicly substantiated by conclusive evidence or a court finding.

Omar was born in Somalia in 1982 and came to the United States with her father and siblings as a refugee in 1995. She became a U.S. citizen in 2000.

The allegations have received renewed attention from federal officials. Border czar Tom Homan said in December 2025 that investigators were reviewing records related to Omar’s immigration history, while House Republicans also sought immigration records connected to the allegations in a January 2026 congressional hearing.

A DHS spokesman said Friday that the department does not comment on specific ongoing investigations or potential future actions, while adding that “no one, including members of Congress, are above the law.”

Mullin said the investigation is broader than Omar alone and includes other cases in which federal officials suspect immigration fraud. He said any enforcement action would be based on evidence of violations rather than a person’s political affiliation.