On Wednesday, without saying his name, the tech businessman took a clear swipe at the Democrat juggernaut.

“Let them do the kind of work they actually want to do, instead of saying to a group of people that you all need to become coders. Like, what is that about?” Yang said at a campaign event in New Hampshire. “You know, maybe Americans don’t all want to learn how to code.”

At a recent campaign event, Biden spoke about coal mining jobs that are in peril in his home state of Pennsylvania, and how American workers may have to evolve their skill sets in order to survive in a modern economy.