Democratic presidential hopefuls
Joe Biden and Bernie Sanders secured crucial endorsements Sunday from prominent black supporters just days ahead of the first round of voting to pit them in a head-to-head contest.
Senator Kamala Harris, a former
Democratic candidate herself, endorsed Biden, while Sanders won the backing of civil rights leader Jesse Jackson as the rival candidates competed for African
American support -- a key demographic in the fight for the party's nomination.
Voters in six states go to the polls Tuesday, a week after the "Super Tuesday"
elections dramatically reversed the two men's fortunes, snatching the frontrunner's title from Sanders and revitalizing Biden, who now holds a lead in delegates to the nominating convention.