WASHINGTON — A House committee is demanding that 15 federal agencies fully account for senior officials’ travel following reports of costly plane travel by Trump Cabinet secretaries.

In letters sent this week, the House Oversight and Government Reform Committee threatened to subpoena the Agriculture and Justice departments by the end of the month if officials fail to provide all the information requested on the use of government-owned aircraft for personal travel or private aircraft for official travel. The Republican-controlled committee also widened the scope of its inquiry to include Obama-era travel.

The panel said 13 other departments and agencies, including the White House, have only partly responded to its requests so far.

The House committee is investigating air travel following reports that Health and Human Services Secretary Tom Price used pricey charters when cheaper commercial flights were available. Price resigned last month.

That Sept. 26 request from the committee sought passenger names, destinations, explanations and cost of the government-owned and private aircraft travel.

The Justice Department said Thursday it was in the process of responding to the House committee’s request. A spokesman for the Agriculture Department did not have immediate comment.

For all the departments and the White House, the oversight committee also requested additional travel information for the time period of Jan. 1, 2016 to Jan. 19, 2017, an expanded probe intended to also scrutinize plane travel by senior officials during the Obama administration.

Such detail is needed “to assess the frequency and nature of this issue to help determine whether new policies or regulations need to be enacted or perhaps to even change the nature of appropriations to your department,” the letter reads.

Travel details were initially due Oct. 10; the panel set a new deadline of Oct. 31.

The 13 departments and agencies deemed to have only partially responded to the committee’s request are the White House, the departments of Defense, Education, Health and Human Services, Homeland Security, State, Treasury, Transportation and Veterans Affairs, as well as the Environmental Protection Agency, NASA, the U.S. Agency for International Development and the Small Business Administration.

Several Cabinet members have faced questions about travel since Price resigned.

They include Interior Secretary Ryan Zinke, Energy Secretary Rick Perry and EPA chief Scott Pruitt, who have acknowledged the use of government or private flights costing tens of thousands of dollars. Zinke and Pruitt are being investigated by their respective department’s inspector general for their trips, which they said were pre-approved by ethics officials. Perry also has defended his travel as being pre-approved and appropriate for his work.

At the VA, Secretary David Shulkin is being investigated by the IG for a 10-day trip with his wife to Denmark and England in July that mixed business with sightseeing, including a Wimbledon tennis match. The VA has not released taxpayer cost information in response to media inquiries or a request by Sen. Jon Tester, the top Democrat on the Senate Veterans Affairs Committee, saying Shulkin traveled on a commercial airline and his wife was approved for “temporary duty” travel expenses, which entitled her to airfare and meals. On Thursday, the VA disclosed that while Shulkin’s wife, Merle Bari, was eligible for per diem expenses, she “did not accept it.”

“VA paid for her plane ticket only,” said VA spokesman Curt Cashour. He did not respond to a renewed request for cost breakdowns.

The 10 agencies deemed by the House committee to have provided all the previously requested information are the departments of Commerce, Energy, Housing and Urban Development, Labor and Interior, as well as the General Services Administration, National Science Foundation, Nuclear Regulatory Commission, Office of Personnel Management and Social Security Administration.


Associated Press writers Matthew Daly and Sadie Gurman contributed to this report.