CNN chief medical correspondent Dr. Sanjay Gupta, a brain surgeon, suggested on Friday that President Biden should take a cognitive test and share the results with the public after his controversial debate performance that has prompted some Democrats to call on him to exit the presidential race.

Gupta described Biden's debate performance as “concerning” in an op-ed published on Friday.

“From a neurological standpoint, we were concerned with his confused rambling; sudden loss of concentration in the middle of a sentence; halting speech and absence of facial animation, resulting at times in a flat, open-mouthed expression,” he wrote.

"The consensus from the doctors reaching out to me, however, was that the president should be encouraged to undergo detailed cognitive and movement disorder testing, and those results should be made available to the public," he added.

White House Press Secretary Karine Jean-Pierre told reporters earlier this week that Biden's last full medical exam was in February. She did not respond directly to questions from journalists about releasing the full results from the last test to the public. A cognitive test was reportedly not a part of Biden's medical exam in February.