Donald Trump challenges Joe Biden to cognitive test but confuses name of doctor who tested him

Donald Trump suggested President Joe Biden take a cognitive test but mistakenly referred to his former physician, Rep. Ronny Jackson, as "Ronny Johnson." Trump, who took the cognitive test in 2018, questioned Biden's mental acuity during a Detroit speech. Critics seized on Trump's gaffe, with Biden's campaign highlighting the error. Trump also misrepresented a video of Biden at the G7 summit, falsely claiming Biden was confused, which Biden's campaign dismissed as misleadingly edited.