Steven Mnuchin and his wife Louise Linton © Bloomberg

Steven Mnuchin, US Treasury secretary, inquired about the use of a military aircraft to go on honeymoon this year but his department later decided to withdraw the request. 

A Treasury spokesperson said the department considered the use of a military aircraft among a range of options because of the need to ensure secure communications during Mr Mnuchin’s extended travel.

The request for an air force jet was first reported by ABC News, which added that the US Treasury’s Office of Inspector General was now looking into the matter. Mr Mnuchin was married to Scottish actress Louise Linton in June and the couple subsequently travelled to Scotland, France and Italy.

It is not the first time Mr Mnuchin has faced scrutiny over his travels. The Inspector General is inquiring into the couple’s trip last month to Kentucky, which involved a viewing of the solar eclipse. The Treasury has said the purpose of the trip, which involved a government aircraft, was to conduct meetings on tax reform.

The Treasury spokesperson said on Wednesday night that Mr Mnuchin was involved in many national security issues, including North Korea, Iran and Venezuela, and that it was “imperative” that he have secure communications. 

“It is our practice to consider a wide range of options to ensure he has these capabilities during his travel, including the possible use of military aircraft,” the Treasury spokesperson said. “Treasury withdrew its request after a secure communications option was identified during the secretary’s extended travel.” 

Rich Delmar, counsel to the Inspector General, said in an email to the FT that the “Treasury OIG is looking at all requests for and use of government aircraft”.

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