Democrats on the House Oversight Committee are calling on the panel's Republican chairman to subpoena documents from the Trump Organization.

In a letter to Chairman Trey Gowdy Harold (Trey) Watson GowdySunday shows preview: Election integrity dominates as Nov. 3 nears Tim Scott invokes Breonna Taylor, George Floyd in Trump convention speech Sunday shows preview: Republicans gear up for national convention, USPS debate continues in Washington MORE (R-S.C.) on Thursday, 17 panel Democrats called for a "serious investigation" into whether President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE's businesses are violating the emoluments clause of the Constitution, which bars federal officials from accepting payments or gifts from foreign governments.

They accused Trump and his attorneys of stalling "virtually any credible oversight" related to potential emoluments clause violations and said a subpoena was necessary because the Trump Organization failed to provide documents they previously requested.

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The letter to Gowdy comes exactly a year after Trump held a news conference announcing that he would not liquidate his business assets or put them into a blind trust, but would instead hand day-to-day control of the Trump Organization over to his two adult sons.

"Now that a year has passed since the President and his attorneys held their press conference, there is no longer any reason for the Trump Organization to continue defying our Committee's request for documents and a briefing," the letter reads.

"For these reasons, we respectfully request that you now issue a subpoena to compel the Trump Organization to produce, by January 20, 2018, all of the following documents, which were requested on a bipartisan basis more than eight months ago."

The Democrats are seeking documents regarding how the Trump Organization identifies payments from foreign governments, as well as documents on whether Trump is making good on his promise to donate such payments to the U.S. Treasury.

Trump has come under scrutiny since taking office for his continued ownership of the Trump Organization, with ethics watchdog groups alleging violations of the Emoluments Clause.

A federal judge dismissed a lawsuit over the emoluments clause last month, saying that the plaintiffs, led by the group Citizens for Responsibility and Ethics in Washington, failed to show standing to bring the case.