From a New York Times story by Michael C. Bender and Michael Gold headlined “How Trump’s Verbal Slips Could Weaken His Attacks on Biden’s Age”:

One of Donald J. Trump’s new comedic bits at his rallies features him impersonating the current commander in chief with an over-the-top caricature mocking President Biden’s age.

With droopy eyelids and mouth agape, Mr. Trump stammers and mumbles. He squints. His arms flap. He shuffles his feet and wanders laggardly across the stage. A burst of laughter and applause erupts from the crowd as he feigns confusion by turning and pointing to invisible supporters, as if he does not realize his back is to them.