President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE reportedly wrote to George Conway, a vehement Trump critic and the husband of White House counselor Kellyanne Conway Kellyanne Elizabeth ConwaySpecial counsel investigating DeVos for potential Hatch Act violation: report George and Kellyanne Conway honor Ginsburg Trump carries on with rally, unaware of Ginsburg's death MORE, more than a decade ago, praising his legal skills and his voice.

The Washington Post published a copy of the letter roughly an hour after Trump called George Conway a "total loser" in the wake of the attorney's recent tweets suggesting the president has multiple diagnosable personality disorders.

In the 2006 correspondence, Trump expresses appreciation for Conway's help in a dispute at Trump World Tower in New York.

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"I wanted to thank you for your wonderful assistance in ridding Trump World Tower of some very bad people," Trump wrote. "What I was most impressed with was how quickly you were able to comprehend a very bad situation. In any event, the building has now been normalized, and the employees are no longer doing menial tasks, etc. for our former Board Members."

"PS—And, you have a truly great voice, certainly not a bad asset for a top trial lawyer!” Trump added.

The letter is dated April 13, 2006. It comes on letterhead bearing the president's name, as well as a signature that appears to be Trump's.

The president's appreciation for Conway's work 13 years ago marked a sharp departure from his present-day relationship with the attorney.

After the president's 2020 campaign manager suggested that Conway is "jealous" of his wife's success, Trump called the attorney a "total loser."

George Conway, who has garnered a large following on Twitter for his constant critiques of the president, has questioned the president's mental fitness in recent weeks.

He suggested Monday that the president has at least two diagnosable personality disorders, sharing an image of the cover of the Diagnostic and Statistical Manual of Mental Disorders and the pages for narcissistic personality disorder and antisocial personality disorder on Twitter.

Conway replied shortly after the president's tweet, mocking Trump for ensuring that "millions of more people are going to learn about narcissistic personality disorder."

He later laughed off a claim from Trump's campaign manager that the president "couldn't pick [Conway] out of a lineup."

The Conways have remained publicly civil despite their disagreements regarding the president. On Monday, Kellyanne Conway said she doesn't share her husband's concerns about Trump's mental fitness. She said last November that her husband's criticism of Trump "doesn't affect me or my job."

Trump previously chided George Conway in November, asserting that he was "just trying to get publicity for himself" after the attorney wrote an op-ed raising concerns about the appointment of then-acting Attorney General Matthew Whitaker.

Updated at 3:25 p.m.