Clinton Strong in South Carolina But Warning Signs Ahead, Bloomberg Poll Shows

Hillary Clinton holds a commanding lead over Bernie Sanders in South Carolina thanks to a 3-to-1 advantage among African-American voters, according to a Bloomberg Politics poll that shows the Democrats' fourth nominating contest still can be a Clinton firewall to blunt her rival's momentum.

But the survey also carries warning signs for Clinton about where the loyalties of white Southern Democrats lie as the campaigns prepare for the crush of Super Tuesday contests just three days after South Carolina's Feb. 27 primary. And it underscores how crucial it will be for Clinton to sustain her lead with black and Hispanic voters, and turn them out, in those contests and beyond.