Trump boasts of cognitive test, then flubs doctor's name

The only problem: he then immediately got confused on the name of the doctor who oversaw the test. Trump extolled his powers of mental recall in a speech to hard-right allies in Detroit, challenging Biden to take the same cognitive exam he says he underwent in 2018 with then White House physician Ronny Jackson. However, he immediately flubbed the name of the former official, who is now one of his loyal supporters in Congress. "Doc Ronny Johnson," said Trump, who turned 78 on Friday. "Does everyone know Ronny Johnson, congressman from Texas?