In a 2-1 ruling, the appeals court batted away Trump's legal claims.
RELATED: Key figures on Oversight and Reform Committee
Key figures on Oversight and Government Reform Committee
Key figures on Oversight and Government Reform Committee
UNITED STATES - JANUARY 29: Chairman Elijah Cummings, D-Md., and ranking member Rep. Jim Jordan, R-Ohio, conduct a House Oversight and Reform Committee business meeting in Rayburn Building on Tuesday, January 29, 2019. (Photo By Tom Williams/CQ Roll Call)
Rep. Elijah Cummings, D-Md., Chairman of House Oversight and Government Reform Committee
(Photo By Tom Williams/CQ Roll Call)
UNITED STATES - JANUARY 29: Ranking member Rep. Jim Jordan, R-Ohio, right, and Rep. Mark Meadows, R-N.C., are seen during a House Oversight and Reform Committee business meeting in Rayburn Building on Tuesday, January 29, 2019. (Photo By Tom Williams/CQ Roll Call)
UNITED STATES - JUNE 30: Carolyn Maloney, D-NY., during the House Oversight and Government Reform Committee Democrats hold a forum on 'Law Enforcement Tools to Stop the Flood of Illegal Weapons' on both sides of the U.S.-Mexico border. (Photo By Douglas Graham/Roll Call)
UNITED STATES Ð MAY 10: Rep. Justin Amash, R-Mich., listens during the House Oversight and Government Reform Committee hearing on 'The Future of Capital Formation' on Tuesday, May 10, 2011, at the US Capitol. (Photo By Bill Clark/Roll Call)
Delegate Eleanor Holmes Norton (D-DC), speaks to reporters, after U.S. President Donald Trump's second State of the Union address to a joint session of Congress at the U.S. Capitol in Washington, D.C., on Tuesday, Feb. 5, 2019. (Photo by Cheriss May/NurPhoto via Getty Images)
UNITED STATES - JANUARY 29: Rep. Katie Hill, D-Calif., arrives for a House Oversight and Reform Committee business meeting in Rayburn Building on Tuesday, January 29, 2019. (Photo By Tom Williams/CQ Roll Call)
WASHINGTON, DC, UNITED STATES - 2018/12/12: US Representative Debbie Wasserman Schultz (D-FL) at the American Zionist Movement / AZM Washington Forum: Renewing the Bipartisan Commitment Standing with Israel and Zionism in the Capitol Visitor Center in Washington, DC. (Photo by Michael Brochstein/SOPA Images/LightRocket via Getty Images)
WASHINGTON, DC - FEBRUARY 07: U.S. Rep. Alexandria Ocasio-Cortez (D-NY) (C) during a news conference in front of the U.S. Capitol February 7, 2019 in Washington, DC. Sen. Markey and Rep. Ocasio-Cortez held a news conference to unveil their Green New Deal resolution. (Photo by Alex Wong/Getty Images)
Representative Mark Meadows, a Republican from North Carolina, speaks to members of the media following James Comey, former director of the Federal Bureau of Investigation (FBI), not pictured, testifying before the House Judiciary and House Oversight and Government Reform Committees joint investigation in Washington, D.C., U.S., on Friday, Dec. 7, 2018. Comey said he'll return for a second meeting with House lawmakers after a day of closed-door questioning that he said was related mostly to Hillary Clinton's emails. Photographer: Al Drago/Bloomberg via Getty Images
US Representative Rashida Tlaib, Democrat of Michigan, speaks during a press conference calling on Congress to cut funding for US Immigration and Customs Enforcement (ICE) and to defund border detention facilities, outside the US Capitol in Washington, DC, February 7, 2019. (Photo by SAUL LOEB / AFP) (Photo credit should read SAUL LOEB/AFP/Getty Images)
WASHINGTON, DC - FEBRUARY 11: U.S. Rep. Ayanna Pressley (D-MA) speaks at the End Gun Violence Together Rally hosted by TOMS at Union Market Dock 5 on February 11, 2019 in Washington, DC. (Photo by Paul Morigi/Getty Images)
UNITED STATES - JANUARY 29: Rep. Paul Gosar, R-Ariz., attends a House Oversight and Reform Committee business meeting in Rayburn Building on Tuesday, January 29, 2019. (Photo By Tom Williams/CQ Roll Call)
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"Contrary to the President's arguments, the Committee possesses authority under both the House Rules and the Constitution to issue the subpoena, and Mazars must comply," Judge David Tatel wrote, joined by Judge Patricia Millett. Tatel was appointed by President Bill Clinton. Millett is an appointee of President Barack Obama.
Trump appointee Neomi Rao wrote in dissent that the committee should have asked for the records under the House's impeachment power, not its legislative authority.
"The Constitution and our historical practice draw a consistent line between the legislative and judicial powers of Congress. The majority crosses this boundary for the first time by upholding this subpoena investigating the illegal conduct of the President under the legislative power," Rao wrote.
The case is one of several working its way through courts in which Trump is fighting with Congress over records. The House Ways and Means Committee has sued the Trump administration over access to the president's tax returns . In New York, Trump sued to prevent Deutsche Bank and Capital One from complying with House subpoenas for banking and financial records. A judge ruled against him, and Trump appealed. Trump also is in court trying to stop the Manhattan District Attorney from obtaining his tax returns.
Trump had argued that Oversight committee seeking the records from Mazars is out to get him and lacks a legitimate "legislative purpose" for its request. His lawyers have argued that congressional investigations are valid only if there is legislation that might result from them.
The committee, for its part, has said it is seeking the Trump financial statements, accounting records and other documents as part of its investigation into whether the president has undisclosed conflicts of interests, whether he has accurately reported his finances and whether he may have engaged in illegal conduct before and during his time in office.
The committee says the House is considering legislation related to government conflicts of interest and presidential financial disclosures, among other things.