Rep. Rashida Tlaib Rashida Harbi TlaibTrump attacks Omar for criticizing US: 'How did you do where you came from?' George Conway: 'Trump is like a practical joke that got out of hand' Pelosi endorses Kennedy in Massachusetts Senate primary challenge MORE (D-Mich.) told Treasury Secretary Steven Mnuchin Steven Terner MnuchinHillicon Valley: DOJ proposes tech liability shield reform to Congress | Treasury sanctions individuals, groups tied to Russian malign influence activities | House Republican introduces bill to set standards for self-driving cars Treasury: Trump's payroll tax deferral won't hurt Social Security Treasury sanctions individuals, groups tied to Russian malign influence activities MORE on Wednesday that he should seek his own legal advice, as Mnuchin has rejected Democrats' demands for President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's tax returns.

"Secretary, please seek out legal advice personally, of what your obligations are, because the Department of Justice is not protecting you, it's protecting the president," Tlaib said at a House Financial Services Committee hearing.

Mnuchin last week rejected a subpoena from House Democrats for six years of Trump's tax returns. Mnuchin has said that he has determined after consulting with the Justice Department that Democrats' request lacked a legitimate legislative purpose.

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Tlaib, a prominent supporter of impeaching Trump, argued during the hearing Wednesday that Mnuchin needs to be "very, very clear about what your role is and what your responsibility is to the American people."

"This goes beyond just providing taxes," she said. "It goes about transparency and the fact that no one is above the law."

Tlaib has offered a resolution that calls on the House Judiciary Committee to look at whether the chamber should impeach Trump. Several other Democrats have signed onto the resolution, and a growing number of other Democrats have also said they support an impeachment inquiry.