I’m not quite convinced we are looking at a hyper prosthetic mask, but yes there are many signs that indicate an actor is playing Byden.

If true, then yes this was absolutely intentional to make Byden look weak, frail, and incompetent to awaken the people that voted for him.

Also if true, this actor is doing a brilliant job with all the gaffes and mishaps. It’s actually quite entertaining watching him if you are of the belief that it’s an actor.