Just Being a Smart Ass

After Biden gets his custard, he asks the store manager how much he owes him.
“Lower our taxes and we’ll call it even,” the manager replied.

I don't know about the exchange (did he respond to the store manager at the time) I won't read Biden's mind; but it is one more misstep by Biden.

I wonder if Biden would be called "the smartest man in the room" if he was a Republican.