Did he put skim milk on his Corn Pops?
If Biden does somehow win the Democrat nomination, President Trump should bring a black gentleman approximately Biden's age to the first debate, and have him sit in the first row. At the appropriate time, he then tells Biden that he located "Corn Pop", point the guy out, and have him wave to Biden. After Biden becomes completely unglued on national television, President Trump could then tell him he's only kidding.
Oh, that would be hilarious. Like when Trump brought in Clinton’s lady victims and had them sit in the front row at his debate with Hillary.
He’s the best!