Comment on Democrats unload on Bernie Sanders in likely debate preview

CHARLESTON, South Carolina — Bernie Sanders is facing the greatest test of his presidential campaign as his Democratic rivals prepare to launch a series of attacks on the Vermont senator during what could be a pivotal debate on the eve of the South Carolina primary. With mounting fear among the Democratic establishment that the self-described democratic socialist is on the verge of gaining a significant lead in the delegates needed to secure the nomination, several candidates are resorting to a last ditch effort to stop him.