Socialist standard-bearer could also get a surprise boost in early-voting South Carolina ...
Former Democratic presidential nominee goes after her 2016 rival, now one of the frontrunners for the 2020 nomination.
Former frontrunner's campaign falls apart ...
President planning a trip to historically black college in Columbia, S.C. to participate in "justice forum ..."
Black support continues to power "First in the South" frontrunner ...
But will it go the distance?
Will it help him, though?
Maybe he wasn't born to be president after all?
Survey shows former vice-president with big lead over Donald Trump ...
Former vice president is blowing the doors off the competition ...