Of the many attacks between this year's US presidential candidates, some of the harshest have pitted Vivek Ramaswamy against Nikki Haley. Ramaswamy went so far as to hold up a sign at a debate calling the South Carolina former governor and UN ambassador corrupt over her corporate work -- and she has hit back hard, calling him untrustworthy and berating him for mentioning her children. Personal attacks are routine in US politics, and both Haley and Ramaswamy, a 38-year-old entrepreneur who has never held elected office, are facing uphill climbs to wrest the Republican nomination from former president Donald Trump.
