Agents from Homeland Security Investigations, part of US Immigration and Customs Enforcement, executed what the Department of Justice called a "judicially authorised search warrant" at the congresswoman's home on Monday morning. The street was blocked off and agents were seen removing boxes labelled "Seized Property Evidence".
The Justice Department said only that the search was part of "an ongoing federal investigation". A person described as familiar with the investigation told Reuters that it relates to alleged immigration fraud, and that part of it concerns paperwork filled out by Omar's late father when she was a child.
Omar, who represents Minnesota's 5th congressional district, fled Somalia's civil war at age eight and spent four years in a refugee camp in Kenya before moving to the United States in the 1990s. She became a citizen in 2000.
The congresswoman called the raid an attempt to "weaponise federal law enforcement", and top Democrats said the timing raised "serious questions". Justice Department policy usually avoids taking action whose timing would appear to affect an election or benefit a candidate or party.
President Donald Trump told reporters he had "nothing to do" with the search, saying it was "really up to the DOJ". Vice President JD Vance said in March, without offering evidence, that the administration believed Omar "definitely committed immigration fraud", a claim her office called fabricated and defamatory. Last month, Homeland Security Secretary Markwayne Mullin told a conservative podcast that "something's going to happen" in the case.
Conservative websites have for years alleged that Omar "married her brother" to commit immigration fraud, claims she has dismissed as "disgusting lies". The midterm elections take place on November 3.