The Department of Defense inspector general has issued a scathing review of Rep. Ronny Jackson during his time serving as the top White House physician, concluding that he made “sexual and denigrating” comments about a female subordinate, violated the policy for drinking alcohol while on a presidential trip and took prescription-strength sleeping medication that prompted concerns from his colleagues about his ability to provide proper care.

The findings outlined in the report, which was obtained by CNN prior to its release on Wednesday, stem from a years-long IG investigation into Jackson – who currently represents Texas in the House of Representatives and sits on the House Armed Services subcommittee overseeing military personnel – that was launched in 2018 and examines allegations that date back to his time serving during the Obama and Trump administrations. Members of Congress were briefed on the IG report findings on Tuesday, according to two sources familiar with the matter.

Jackson claimed the report was politically motivated in a statement to CNN on Tuesday, saying the inspector general “resurrected” old allegations against him because he refused to “turn my back on President (Donald) Trump,” who was a vocal supporter of his 2020 congressional bid. He also told CNN he rejects “any allegation that I consumed alcohol while on duty.”

WASHINGTON, DC - JANUARY 16: Physician to U.S. President Donald Trump Dr. Ronny Jackson speaks during the daily White House press briefing at the James Brady Press Briefing Room of the White House January 16, 2018 in Washington, DC. Dr. Jackson discussed the details of President TrumpÕs physical check-up from last week. (Photo by Alex Wong/Getty Images)
Read: The Department of Defense inspector general's report on the conduct of Rep. Ronny Jackson
After interviewing 78 witnesses and reviewing a host of White House documents, investigators concluded that Jackson, who achieved the rank of Rear Admiral, failed to treat his subordinates with dignity and respect, engaged in inappropriate conduct involving the use of alcohol during two incidents and used sleeping medication during an overseas trip that raised concerns about his ability to provide medical care to the President and other top officials, according to the report.

The report also notes that the investigation into Jackson “was limited in scope and unproductive” as White House counsel under Trump insisted on being present at all interviews of current White House Medical Unit employees, which had a “potential chilling effect” on the probe.