Lincoln Chafee, the former Rhode Island governor, has failed to garner a single supporter in the last four national polls, which have queried a total of 1,475 Democrats and Democratic-leaning voters.
The latest poll came after Mr. Chafee got free publicity from Conan O’Brien, the comedian who began a “Get Lincoln Chafee to 1%” campaign on his television show in August.
Patrick Murray, director of the independent Monmouth University Polling Institute, addressed the comedian’s efforts in the poll’s analysis: “Sorry, Team Coco,” he wrote, using a nickname for Mr. O’Brien and his fans. “You failed: Maybe you should think about switching to Jim Gilmore,” Mr. Murray wrote, referring to another candidate, a Republican, who is failing to register.