Omar's representative says he "will not shut up" after federal agents raided his home.

Democratic leaders condemned the raid on Omar's home, calling it "deeply disturbing."

Minnesota Democrat Rep. Ilhan Omar on Monday afternoon called federal agents' search of his Washington, D.C. home "an attempt to target political enemies and arm federal law enforcement." The Somali-born lawmaker had previously been insulted by US President Donald Trump.

Omar said in a post on social networks: "Trump has targeted me with baseless lies and defamation campaigns for ten years." "I will not be silenced."

The US Congress is not currently in session and it is unclear if Omar was home at the time of the search.

"Today in the Washington, D.C. area, Homeland Security Investigations executed a judicially authorized search warrant secured by the Department of Justice. This enforcement action is part of a federal criminal investigation," a Justice Department spokesperson told TIME. No further details were provided.

TIME has contacted the White House and Omar's office for more information.

While the motive for the criminal investigation remains unclear, this is not the first time Omar's immigration record has become a focal point. Earlier this year, Rep. Nancy Mays, R-South Carolina, unsuccessfully subpoenaed records related to Omar, who became a U.S. citizen in 2000 when he was 17.

In a podcast interview in March, Vice President J.D. Vance said, without providing evidence, "We actually think that Hailhan Omar definitely committed immigration fraud." The U.S. Office of Life at the time dismissed Vance's claims as false and defamatory.

The raid comes just over three weeks before midterm elections in which Republicans will fight to retain control of the House and Senate.

Minnesota Gov. Tim Walz led Democrats in condemning the attack, saying, "Americans see it right — President Trump is abusing his power to go after political opponents weeks before an election."

House Minority Leader Hakeem Jeffries called the attack "deeply troubling" and argued that it raises "serious questions about the continued weaponization of the federal government's corruption" against Trump's opponents.

"Now, less than 30 days before the midterm elections, his violent mass deportation machine has descended upon the home of an elected member of Congress and his family," he said in a statement signed by House Minority Representative Kathryn Clark and House Democratic Speaker Pete Aguilar.

Representative Ro Khanna of California called the attack a "disturbing" development and called on "every decent American" to "stand up and speak out."

Omar has accused Trump of having a "strange" obsession with him

Trump has long targeted Omar and his native Somalia in his anti-immigration speeches and remarks.

Last December, Trump referenced Omar during an anti-immigration tirade during a speech in Pennsylvania, claiming he does "nothing but b-tch" and arguing that he is from the "worst" county in the world. "We've got to take him to hell," the president said, pausing as members of the crowd chanted "Bring him back."

Omar responded by saying that Trump's "obsession" with him is "beyond strange."

Reacting to a clip of the president's speech, Omar said on social media: "Since he has no economic policy to promote, he instead reverts to bigoted lies." He is still a source of national shame."

In January, Omar was approached by a man with a syringe during a town hall meeting in Minneapolis. The man sprayed her with poison before being restrained by security forces at the scene. Laboratory analysis later determined that the liquid contained acetic acid and identified it as a mixture of water and apple cider vinegar. Last month, a 56-year-old man named Anthony James Kazmirczak was sentenced to 14 months in prison for the attack.

Shortly after the town hall incident, Omar called out Trump's use of "hateful rhetoric" against him and suggested he was being targeted.

"What the facts have shown, since I've taken office, is that every time the president of the United States chooses to use hateful rhetoric to talk about me and the community that I represent, my death threats escalate dramatically," he said. "If Donald Trump wasn't there, I wouldn't be where I am today. I would have to pay for security, the government would think about providing security for me. The office and if he wasn't so obsessed with me."