India, Feb. 5 -- US President Joe Biden on Saturday won the South Carolina Democratic primary - the first officially sanctioned race of the party's nominating season - with returns showing him swamping two other candidates, according to Edison Research. While Biden, 81, faced little opposition, the vote was being closely watched amid concerns about his popularity, especially among Black voters. Biden won more than 96% of the word, way ahead of his two main challengers, US representative Dean Phillips and self-help author Marianne Williamson.P13...