House Democrats said in a letter on Thursday that the White House is ignoring requests for information from the government's top watchdog and are asking for a hearing on the matter.

"We are writing to request that you hold an immediate hearing on the dramatic decision by the White House to obstruct investigations by our independent investigators at the Government Accountability Office. We ask that the Committee obtain testimony from the White House Counsel and General Counsel of GAO," Democratic lawmakers wrote in a letter to House Oversight and Government Reform Committee 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.), referring to the Government Accountability Office (GAO).

The letter was led by the committee's ranking member, Rep. Elijah Cummings Elijah Eugene CummingsBlack GOP candidate accuses Behar of wearing black face in heated interview Overnight Health Care: US won't join global coronavirus vaccine initiative | Federal panel lays out initial priorities for COVID-19 vaccine distribution | NIH panel: 'Insufficient data' to show treatment touted by Trump works House Oversight Democrats to subpoena AbbVie in drug pricing probe MORE (D-Md.).

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The lawmakers went on to cite a separate letter from GAO General Counsel Thomas Armstrong to White House counsel Don McGahan.

"I understand that attorneys from your office and the National Security Council (NSC) will not respond to the inquiries or otherwise engage with GAO staff during the course of our reviews," Armstrong wrote. "This approach represents a clear departure from past practice."

Armstrong said the GAO had asked for meetings over the past year on a variety of different topics, including the NSC's role in "conflict prevention, mitigation, and stabilization efforts abroad" and the cost of presidential travel.

He also said the GAO had contacted Vice President Pence's office but did not receive a response.

The Hill has reached out to the White House for comment.