U.S. President Joe Biden on Saturday easily won South Carolina's Democratic primary that formally began the party's nomination process for the November presidential election, saying he is confident of defeating his predecessor Donald Trump, the clear front-runner in the Republican race.Although the outcome was not in doubt, the primary was a significant test of the incumbent president's standing among black voters, who account for more than half of the party's electorate in the Southern state and played a crucial role in his victory in the previous election.Despite concern about his age, th…READ FULL ARTICLE