The lefty hacks at Think Progress published a piece of fiction about Judge Kavanaugh's views on abortion and contraception. Their claims had already been thoroughly debunked by most major news outlets in the United States before they even ran them. They were playing off claims California Senator Kamala Harris had made by selectively editing a statement from Kavanaugh.
Consequently, when Think Progress's claim appeared on Facebook, Facebook included a fact checking statement that their claim was false. It was attributed to the Weekly Standard, which is a conservative publication.
Leftwing activists went nuts pushing a new false claim -- that Facebook was censoring Think Progress because of conservatives. That is not true either.
Multiple publishers across the political spectrum help Facebook with its fact-checking claims. Multiple non-partisan outlets had already debunked Think Progress's claims. The Weekly Standard had a detailed review of Kavanaugh's position and the false claims about what he had actually said.
Think Progress is really admitting it does not like being caught lying. But more importantly, Think Progress is exposing that it really only wants fact checkers to use as a weapon against conservatives. Most major fact checking organizations have a leftwing bias. That's what makes it so much more amazing that fact checking groups would so thoroughly reject Kamala Harris's and Think Progress's claims on Kavanaugh. Think Progress is fine with fact checkers routinely debunking conservatives or claiming things are partially true when they're fully true, but a conservative made the statement.
What Think Progress is not actually interested in is the actual truth. They lied. They got called out. It should not matter whether it was a non-partisan or partisan source. They lied. End of story.