CNN's Dr. Sanjay Gupta: Biden Must Do Cognitive Testing and Release Results

CNN’s Chief Medical Correspondent Dr. Sanjay Gupta called Friday for Joe Biden to undergo full neurological and cognitive testing after his disastrous debate performance–and revealing serious medical concerns about the president’s state.

Gupta, a neurosurgeon, wrote in an extended essay for CNN that “as a brain specialist, it was concerning to watch President Joe Biden” during the debate and said that a dozen colleagues had been in touch with him since to share their worries.