Mark Zuckerberg is taking heat from the right for Facebook’s new “fact-checking” initiative to police fake news.

Conservative pundits and publications are charging that most of the third-party organizations recruited this week to filter fake news stories from Facebook have a track record of liberal bias.

Snopes, ABC News, Politifact and FactCheck.org all “have records of left-wing partisanship — particularly throughout the 2016 election,” Breitbart News reported Thursday.

For example, the alt-right news site noted, Politifact had reported it was “mostly false” when Donald Trump claimed in a presidential debate that Hillary Clinton wanted “open borders.”

“PolitiFact made this ruling despite Clinton being on the record at a paid speech saying ‘My dream is a hemispheric common market, with open trade and open borders,’” according to Breitbart.

That’s despite Zuckerberg’s insistence this week that Facebook will “resist the path of becoming arbiters of truth ourselves,” as he scrambles to avoid accusations of censorship.

Elsewhere, the right-leaning Daily Caller reported that Snopes’ “main political fact checker,” Kim Lacapria, has described herself as “openly left-leaning” and trashed the Tea Party as “teahadists.”

Brent Bozell, president of the right-leaning Media Research Center, said in a Friday blog post that he had “expressed grave concern” in a conversation with Zuckerberg this week about “the liberal ‘fact-checking’ organizations Facebook has chosen.”

Zuckerberg responded by assuring him that his “express aim is to eliminate only patently false news stories from Facebook,” according to Bozell.

“He underscored he has instructed these organizations to focus only on truly fake news and nothing of a political nature,” Bozell added. “I will accept in good faith his commitment to address our concerns on this matter. It is my hope this will be the last we say about this issue.”

Not likely, according to other conservatives on Twitter this week.

“Fact-checkers all seem to be from the left,” Republican strategist Evan Siegfried wrote. “Not good for conservatives.”

“OH HELL NO,” Mark Hemingway, senior writer at the Weekly Standard, tweeted Thursday. “Facebook is bringing in Poynter/PolitiFact to police ‘fake news’? They’re INCREDIBLY biased.”