Read: Obama sent ugly email to personal physician after he questioned Biden’s cognitive health

A newly leaked email reveals former President Barack Obama excoriated a White House physician who served under both his administration and that of Donald Trump for questioning the mental fitness of Joe Biden. 

According to a Fox News report Wednesday, Dr. Ronny Jackson received the stern rebuke after a 2020 tweet he sent about Biden’s cognitive decline.

Jackson was, at that time, running for the U.S. House of Representatives in Texas; he would go on to win that race.

In 2018, Jackson had also drawn ridicule from commentators for a cognitive evaluation he’d given to then-President Trump, finding he was in “excellent” mental condition with “absolutely no cognitive or mental issues whatsoever.”

Jackson had retweeted a video of what he called Biden’s “latest cognitive misadventure.”

“Remember the cognitive test that I gave @realDonaldTrump? The one he aced! Sounds like somebody else might need some testing done!! Scary!!” he tweeted.

Obama sent him a “scathing” email within 20 minutes of the tweet going up.

“I have made a point of not commenting on your service in my successor’s administration and have always spoken highly of you both in public and in private,” Obama wrote.

“You always served me and my family well, and I have considered you not only a fine doctor and service member but also a friend.

“That’s why I have to express my disappointment at the cheap shot you took at Joe Biden via Twitter. It was unprofessional and beneath the office that you once held. It was also disrespectful to me and the many friends you had in our administration,” he continued.

“You were the personal physician to the President of the United States as well as an admiral in the U.S. Navy. I expect better, and I hope upon reflection that you will expect more of yourself in the future.”

Jackson first revealed the email in his memoir, “Holding the Line: A Lifetime of Defending Democracy and American Values.”

“Biden was on TV again, making crazy statements and concerning mental gaffes; he didn’t know what state he was in or what office he was campaigning for,” Jackson wrote of Biden’s cognitive state during the 2020 election cycle.

“He apparently thought at one point that he was running for the Senate and later couldn’t remember what state he was campaigning in. This had been going on for months and was getting worse.”

Jackson said he considered calling Obama about the email. However, friend and conservative podcaster Dan Bongino reminded him that Obama had stayed quiet while the media pilloried Jackson during a bitter confirmation fight after Trump had nominated him to be head of the Department of Veterans Affairs.

“So, upon reflection, I thought, You know what? Screw that guy! I’m not doing it,” Jackson wrote. “I just walked away from it, which was the last time I had any contact with [Obama].”

“It’s awfully ironic now, considering [Biden’s mental fitness] is all anyone, including the liberal media, can talk about,” he added.