Donny has suddenly realised one or problems building his “impenetrable, physical, tall, powerful, beautiful, southern border wall” between the US and Mexico.
For a start he doesn’t have a enough bricks just at the moment. A few calculations show the problem.
It has then dawned on him that he doesn’t have enough brick-layers even if he had the bricks! He may have to put out a call for brickies from around the world to make up the numbers! Reminds us of a famous old TV show!