Maybe that’s the trick: Whatever you lose in mental acuity, you lose the same amount in self-awareness.

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.

He exited the presidential race after appearing so befuddled in a July debate against Trumpov that many in the country began to question his mental acuity and his ability to lead.

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