Bernie Sanders's surge spreads fear among House and Senate Democrats

During Tuesday night’s Democratic debate in Charleston, S.C., several of Bernie Sanders’s rivals tried to blunt his momentum ahead of Saturday’s Palmetto State primary by claiming, for the first time in a national setting, that the problem isn’t just that the Vermont senator is unelectable himself. It’s that nominating him would make dozens of down-ballot Democratic House, Senate and state legislature candidates more vulnerable too.