The timing of his departure, first reported by Bloomberg, was not immediately clear. A senior administration official said his resignation would take effect “very soon.” Several energy Department officials did not immediately respond to a request for comment.

Perry, the former Texas Governor, has largely avoided the headlines since joining the trump administration in 2017. But in recent weeks, he has become entangled in a democratic impeachment probe into trump’s actions involving Ukraine.

Perry was one of three political appointees overseeing U.S. relations with the country after acting White house chief of staff Mick Mulvaney moved that portfolio away from career staff, Senior state Department official George Kent told House investigators this week behind closed doors. Rep. Jerry Connolly, D-Va., Kent described the account to azhournalists.

Trump also told house Republicans that Perry urged trump to take a July call with Ukrainian President Vladimir Zelensky, who has become the center of an impeachment investigation, according to news website Axios. Perry’s office said it wanted the President to take up the challenge to discuss energy-related issues.

House Democrats investigating whether trump agreed to military assistance to the country in investigating his political rival hit Perry with a subpoena for documents earlier this month. The agenda included a demand by Friday for various materials related to Ukraine.

Perry recently denied reports that he plans to leave office.

– CNBC’s Kayla Tausch contributed to this report.