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

Donald Trump is so proud of a cognitive assessment he took while president that he boasted about it in a speech Saturday, while attacking what he claims is US President Joe Biden's lack of mental acuity.

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.