Cognitive tests can assess mental awareness, reasoning and memory. Cognitive tests are not for gaffes, as Biden and Trump have been prone to make. Biden has had a stutter his entire life, which impacts his public speaking, but not his cognitive ability.

Biden’s last-minute decision to exit the race rendered costly consequences for his party and his legacy – at least in the near future, according to experts.

President Biden’s debate performance Thursday put his apparent cognitive decline on full and dangerous display. For many months now, the 81-year-old Biden has appeared to be faltering and feeble ...

Joe Biden's physician refused to answer questions during a closed-door deposition in House Republicans' probe of his mental acuity as president.

By holding the first debate in the spring, YOU will be able to reach the widest audience possible,’ Biden’s advisers wrote.

Biden dismisses concerns about mental fitness, says he'd drop out if the 'Lord Almighty' told him to. The president sat down with ABC News for his first post-debate TV interview.

The debate over Biden's cognitive health is not new and has parallels to the scrutiny faced by former President Donald Trump.. Trump has repeatedly claimed to have aced the Montreal Cognitive ...

The only way Biden can address concerns about his mental fitness is to debate Trump by Dr. Marc Siegel, opinion contributor - 03/12/24 12:00 PM ET