• Meet the heavyweight political donors who live at River House.

Meet Dr. David Best. He's the Manhattan physician who got booted on last night's episode of the CBS reality competition Greatest American Dog. Best and his little terrier, Elvis, it seems, do everything together. And there's nothing it seems Best won't do for his best friend: The doc spent $10,000 last November on the canine's "Bark Mitzvah" at the Tribeca Grand (left), which attracted Dr. Ruth and Elvis's mother, and also earned him the attention of CBS execs, who promptly signed him up for the dog-centric reality show. So it probably shouldn't come as a surprise that when the judges gave the duo the boot on last night's episode, Dr. Best didn't take it very well. Tears were shed. Dreams were shattered. (You can watch the epic meltdown right here.)