After traumatic Biden cognitive test, ex-White House doc Ronny Jackson received a 'scathing' Obama word

During his recommendation that former presidential candidate Joe Biden go through a cognitive ability test 

former White House health practitioner Ronny Jackson received a "scathing"  

email from former President Barack Obama. Jackson (R-Texas) retweeted a

video of Biden's "intellectual gaffe" on the marketing campaign trail, according to his memoir 

"maintaining the road," which Fox news received. "At one point, 

he thought he was going for walks for the Senate and later couldn't remember where he was 

Throughout the months, this had been taking place and had become worse," he said. 

Did you forget about the cognitive assessment I gave @realDonaldTrump? It was an easy one for him!