US Representative Ilhan Omar has hired two prominent Washington attorneys to defend her against a federal investigation into her immigration history and financial disclosures, days after asking supporters to contribute towards her legal expenses.

Ilhan Omar has hired two prominent Washington attorneys to defend her against a federal investigation. (Getty Images via AFP)

The Minnesota Democrat has retained Amy Jeffress, who previously served as former president Joe Biden’s personal attorney, and Joshua Matz, a lawyer who represented House Democrats during both of President Donald Trump’s impeachment proceedings. Both are partners at Washington-based law firm Hecker Fink, according to the New York Post.

Their appointment comes as federal investigators examine allegations concerning Omar’s immigration records and questions surrounding financial disclosures linked to her husband, political consultant Tim Mynett.

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The appeal attracted attention amid reports that businesses associated with Mynett had been valued at tens of millions of dollars in financial disclosures. Omar has said the valuations were subsequently revised downwards and has defended her financial reporting.

According to the New York Post, campaign finance records filed through October 15 did not show payments directly to Jeffress, Matz or their law firm.

The investigators were examining whether Omar or relatives had provided false information when entering the US as refugees in the 1990s or during the naturalization process. The investigation is ongoing, and no finding of wrongdoing has been established.

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Omar has denied wrongdoing and described the investigation as politically motivated. Her lawyers have challenged the legality of the search and demanded the return of seized property, according to CBS News. The Justice Department has rejected their allegations, saying federal authorities complied with court orders.

Their appointment comes as Trump has repeatedly targeted Omar publicly, including calling for her resignation from Congress. The congresswoman, who arrived in the US as a refugee from Somalia in 1995 and became a naturalized citizen in 2000, is facing heightened scrutiny ahead of the November 3 midterm elections.