It's a make-or-break night for Sanders as Biden tries to build on his momentum from Super Tuesday.
“We deserve a president like him,” the out singer-songwriter says in a new video.
The two are the front-runners among Democratic presidential hopefuls, but Elizabeth Warren and Michael Bloomberg remain very much in the race.
The gender outlaws flex their influence.
The results in a state seen as a must-win for Biden may buoy his campaign.
The last Democratic presidential debate before the South Carolina primary and Super Tuesday was a lively one.
The satirical tweet is being called homophobic.