Donald Trump continues to hold a dominant lead over Nikki Haley in the South Carolina Republican primary race — despite her recent blitz of negative ads attacking her rival‚ according to internal polling conducted by the super PAC backing the former president. Trump‚ 77‚  leads Nikki Haley by a more 2-to-1 margin in the Palmetto State‚ where the 52-year-old White House hopeful was born and raised and served as governor for six years‚ according to a poll released by Fabrizio‚...