By Liam Buckler Donald Trump has launched a scathing attack on Nikki Haley, calling her an “imposter” during his victory speech at the New Hampshire primary. Despite winning the primary and thanking his supporters, the former president took time to repeatedly insult Haley, who came second in the race, and left him the runaway favourite for the Republican nomination. Trump said: “Let’s not have someone take a victory when she had a very bad night,” and added, “Just a little note to Nikki: She’s not going to win.” He also referred to her as an “imposter”. READ MORE: Melania and Ivanka missing fr…