Sen. Bernie Sanders wants to keep his momentum after winning New Hampshire and Nevada, while former Vice President Joe Biden hopes to keep his own campaign alive. The other five candidates are just trying to hang on.
What's happening: Seven contenders for the Democratic presidential nomination are in Charleston, South Carolina, for the tenth debate, just days before the South Carolina primary and a week before Super Tuesday.
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Bernie Sanders is now the clear front-runner for the Democratic presidential nomination, and his opponents are ready to try to knock him down at tonight's debate in Charleston, South Carolina — especially Michael Bloomberg, who was the punching bag at the Las Vegas debate.
Why it matters: This is the last debate before Super Tuesday, when Sanders is expected to win California and Texas and could secure an insurmountable lead for the Democratic nomination. That's a direct threat to the entire field, but especially to Bloomberg, who skipped the early states to focus on the March 3 contests.