Mark Zuckerberg has written a paper on the subject of the lawyer.

The sponsored post by Political Hopeful reads: "Breaking news: Mark Zuckerberg and Facebook just endorsed Donald Trump for re-election.

"You're probably shocked, and you might be thinking," how could this possibly be true? "

"Well, it's not. (Sorry). "

Ms Warren was the highlighting of advertising loophole that means politicians are exempt from the company's third-party fact-checking programs.

She told about 3.3 million Twitter followers: "Facebook holds incredible power to affect our national debate.

Off they themselves, and their investors get out of the way.

"Once again, we're seeing Facebook throwing its hands up to battling misinformation in the political discourse, because when profit comes up against protecting democracy, Facebook chooses profit.

"Donald Trump once through negligence.

"Now they've changed their policy so they can profit from the American people. It's time to hold Mark Zuckerberg accountable. "

Facebook chief executive Mark Zuckerberg with Sir Nick Clegg (Niall Carson / PA)

Decision decision Nick decision Sir political Sir adv Sir adv Sir adv Sir adv Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir Sir.

Speaking at the Atlantic Festival in Washington, DC last month, Sir Nick said "it is not our role to intervene when politicians speak".

"We do not submit speeches by politicians to our independent fact-checkers and we generally allow it on the platform even if it otherwise breaches our normal content rules," he said.