Dr. Ronny Jackson sounded the alarm over Biden’s cognitive health before: “As a citizen of this country, I watch Joe Biden on the campaign trail and I am … convinced that he does not have the mental capacity, the cognitive ability to serve as our commander in chief and head of state,” he told reporters in October, according to The Daily Beast. “I really think that he needs some type of cognitive testing before he takes over the reins as our commander in chief, if that is in the cards.”