It happened again.

Monmouth University found literally no Lincoln Chafee supporters in a national Democratic presidential poll released Tuesday.

The former Rhode Island Republican senator and independent-turned-Democratic governor registered zero percent out of 339 registered voters surveyed.

“The Monmouth University Poll has now interviewed 1,475 Democrats and Democratic-leaning voters in four national polls since Chafee announced his presidential bid in June,’’ said the poll’s press release. “And still, not one single poll participant has selected him in the nomination vote choice question.’’

Chafee trailed Hillary Clinton at 42 percent; Joe Biden at 22 percent; Bernie Sanders at 20 percent; and Martin O’Malley and Jim Webb, both at 1 percent.


“If there’s any accuracy to the Monmouth Poll, it looks like O’Malley, Webb and Chafee still have more work to do,’’ Chafee spokeswoman Debbie Rich told Boston.com

The poll results come despite an effort by Conan O’Brien to get the Democratic presidential candidate to 1 percent, which included a ’’brand-new, unsolicited campaign song’’ performed live by Aimee Mann and Ted Leo.

“Sorry, Team Coco. You failed. Maybe you should think about switching to Jim Gilmore,’’ said Monmouth University pollster Patrick Murray in a statement, referring to the former Virginia governor, who is polling so low in the Republican race he may be excluded from even the next lower-tier debate.

But things aren’t all bad for the Chafee campaign.

Monmouth’s poll had a 5.3 percent margin of error. And the previous national Democratic presidential poll, released August 25 by Public Policy Polling, found 2 percent support for Chafee — or roughly seven people out of 370 usual Democratic primary voters.

He was even leading Harvard professor Larry Lessig at 1 percent.

2016 presidential candidates