The point at which former ambassador to the UN, Nikki Haley, called entrepreneur, Vivek Ramaswamy, "scum" was when the third Republican debate officially descended from bad-tempered to downright vicious. He had just mocked her daughter for being a long-time user of Chinese-owned social media platform TikTok. "Leave my daughter out of your voice," she said, in a way that recalled Will Smith telling Chris Rock to "keep my wife's name out of your f****** mouth", at the Oscars. Haley stopped short of an on-stage slap, but it was reflective of tense exchanges between the candidates over two hours of verbal…