WASHINGTON – Former vice president JoeBiden notched up a resounding win in the South Carolina primary on Saturday,reviving his campaign for the Democratic presidential nomination andpositioning him as the leading rival to frontrunner Bernie Sanders. Democratic presidential candidate Joe Biden celebrates his victory in the South Carolina primary. GETTY IMAGES/AFP “You’ve launched our campaign on the pathto defeating Donald Trump,” he said. (AFP) “Just days ago the press and the punditshad declared this candidacy dead,” Biden told hundreds of supporters at avictory rally in the South Carolina capital Columbia. The victory, powered by support fromAfrican-American voters, was the 77-year-old Biden’s first in the race and maygive him momentum going into “Super Tuesday” next week, when 14 states go tothe polls.