Charleston, South Carolina (CNN) - Tuesday night's debate was a frenetic free-for-all, with six candidates all trying to knock Democratic presidential front-runner Bernie Sanders off the course of claiming the party's nomination.

But a series of narrower fights might have mattered even more, as everyone in the field vies to emerge as the lone challenger to Sanders with time running out: South Carolina's primary is Saturday and Super Tuesday, when 14 states and American Samoa vote, is three days later.

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