Commander, a puppy, is the latest member of the Biden family at the White House. WASHINGTON - President Joe Biden has welcomed a new addition to the family, a puppy named Commander.Biden shared a photo Monday on his official Twitter account with a caption that said, "Welcome to the White House, Commander" as well as a brief video of him tossing a ball to Commander and walking the leashed dog into the White House.No other details about the dog were provided.RELATED: Champ, the Biden's older German Shepherd, dies at the White HouseThe puppy appears to a German shepherd, the breed of Biden’s other two dogs, and was a gift to him from his family, according to CNN, which first reported on the puppy’s arrival after it was seen scampering around.