Some U.S. military stays at President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE's Turnberry resort in Scotland stretched over multiple nights, Politico reported Tuesday.

Scrutiny on military stays at the resort that benefit the president has increased following a report that an Air National Guard crew stayed at the resort in March.

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The Air Force opened an investigation into the stays, and a preliminary result of the review reportedly found the Air Force sent crews to Turnberry up to 40 times since 2015.

The figure does not indicate how many of the stays occurred since Trump was inaugurated in 2017.

The Air Force’s overnight stops at Turnberry have grown since Trump reportedly reached a deal with Glasgow Prestwick Airport in 2014.

While the Air Force has defended the refueling stops at Prestwick as within Pentagon guidelines, it is investigating the stays at Turnberry.

Information about the length of stays at the resort was unknown until Tuesday's report.

One reason for the multinight stays, which a half-dozen staffers told Politico about, is inclement weather that prevents the crews from taking off from Prestwick.

In one instance earlier this year, a crew reportedly stayed at the resort for multiple days while their plane underwent repairs.

The Air Force and Trump Organization, which runs the resort, did not immediately respond to requests for comment from The Hill.

The House Oversight and Reform Committee opened an investigation earlier this year about Air Force expenditures at and around the Turnberry resort and has floated sending subpoenas to the Air Force for further information.