Trump forgets the name of his White House doctor – seconds after challenging Biden to a cognitive test [Video]

Donald Trump forgot the name of his White House doctor just moments after saying Joe Biden should take a cognitive test.

“I took a cognitive test, and I aced it. Doc Ronny — Doc Ronny Johnson,” Trump said, attempting to refer to Ronny Jackson, former White House physician turned US Rep.

“Does everyone know Ronny Johnson, Congressman from Texas? He was the White House Doctor,” Trump continued.

Biden’s campaign circulated the clip on social media, pointing out Trump’s error and confusion over the name. James Singer, a spokesperson for the Biden campaign, told NBC News the former president is “unhinged, unable to focus, and diminishing before our very eyes.”

“His only coherent thoughts this week were his affinity for more corporate tax cuts for billionaires, tax increases for the middle class, and his disdain for the people of …