Donald Trump is going all in with the Friday the 13th motif in attacking Ben Carson. In a video posted to Instagram, spooky, suspenseful music plays as footage of Carson speaks about past claim of physical violence, one that he attributed to his "pathological temperament" in his book "Gifted Hands." "I had a large camping knife, and I tried to stab him in the abdomen," a younger Carson says in the video, before a clip of CNN's report last week shows a man who appeared to question Carson's autobiographical account. "What?" the former neighbor tells CNN in the video, who...