Democratic lawmakers have opposed the investigation into Ilhan Omar, a Minnesota lawmaker, over alleged immigration fraud, accusing Donald Trump’s administration of weaponising federal law enforcement.

A letter dated October 26, written by Rep. Pramila Jayapal (D-Wash.) and signed by 175 House Democrats, accused the Justice Department and the Department of Homeland Security of weaponising law enforcement against Ms Omar.

“We write to express our unequivocal opposition to your raid of Congresswoman Ilhan Omar’s home. We are profoundly alarmed by your weaponization of federal law enforcement against her and demand you refrain from taking any further actions that could affect the outcome of any upcoming election,” Democratic lawmakers said.

Condemning the raid on Ms Omar’s Washington, D.C., home on October 12, the lawmakers said the Trump administration’s “actions are clearly driven by a pre-determined political outcome rather than an objective pursuit of justice.”

“Both the White House and the Department of Justice (DOJ) acknowledged that DOJ secured the search warrant as part of an ongoing criminal investigation. This weaponisation of law enforcement to harass a sitting Member of Congress 22 days before an election is unprecedented and unacceptable,” the lawmakers said.

Ms Omar, a Somali-born American lawmaker, has been at the centre of controversy over allegations that she married her brother to bring him into the United States and secure his citizenship.

She has denied wrongdoing, dismissing reports that she married her brother as lies that originated from a Somali blog. Meanwhile, Mr Trump said she could be jailed, denaturalised and deported if investigations found the allegations against her to be true.

Former U.S. President Barack Obama has faulted the probe into Ms Omar’s immigration record and other related matters, describing it as a political witch-hunt weeks before the midterm elections.

“The full weight of the federal government is being brought down on a law-abiding elected official because she has dared to criticize the president,” Mr Obama said in a post on X, describing Ms Omar’s probe as “so appalling”.