If he were mentally sharp, he'd already have a dozen comebacks ready to go. It's not like the phrase is going away anytime soon. And this is not the first time he and other high level Democrats have been heckled with the slogan.
I was raised in the South where the phrase, "Well, bless your little heart!" was born. It's a mechanism to halt an argument and slam the other person at the same time, all the while remaining calm, smiling and avoiding a scene.
Caller: "Merry Christmas, and Let's Go, Brandon!"
Biden: "Well, bless your heart. Buh-bye!!"
A good portion of the nation would understand what happened, and the response would be like:
