acuity

Before his disastrous debate performance against President-elect Donald Trump, polling indicated widespread concern over Biden's age and mental acuity, which helped tank his approval rating.

Trump’s recent comments and his decision to just listen to music at a rally provided the starkest picture yet of his waning mental acuity.

Harris, riding a wave of enthusiasm from Democrats who had grown concerned about Biden’s age and mental acuity, initially surged in the polls.

Biden’s debate offered a stark window into the fading acuity of a sitting president.

Trump’s recent comments and his decision to just listen to music at a rally provided the starkest picture yet of his waning mental acuity.