United States Democratic presidential candidate Bernie Sanders is increasingly being viewed as a threat to front-runner Hillary Clinton.
The self-described socialist is calling for free higher education and more government-funded jobs.
Supporters of the Vermont senator see him as more of a populist leader than Clinton, who they view as a candidate backed by wealthy corporations.
Watch Al Jazeera correspondent Tom Ackerman's report from the campaign trail with Sanders in South Carolina.
Source: Al Jazeera