A far-right writer threatened he would "destroy marriages" with "the mother of all stories" if Steve Bannon was ousted from the White House.

Mike Cernovich, a ringleader of the so-called alt-right, claimed to "know everything" and said he would publish a series of salacious scoops if Donald Trump sacked his controversial chief strategist.

Mr Bannon, the driving force behind some of the US President's most contentious policies, departed the Republican's administration on Friday.

He later declared Mr Trump's presidency "over" and said he felt "free" after returning to the helm of right-wing news website Breitbart, which he co-founded.

Mr Cernovich responded to the news in a Periscope video in which he claimed: "I can tell you the truth now about everything."

In an earlier video, posted in April, he had threatened to drop "the motherlode" if Mr Bannon was fired.

"I'm sitting on way more stories, you won't believe it," he said in a 10-minute self-recorded monologue.

“If they get rid of Bannon, you know what’s gonna happen? The motherlode. If Bannon is removed, there are going to be divorces, because I know about the mistresses, the sugar babies, the drugs, the pill popping, the orgies. I know everything."

"He added: "If they go after Bannon, the mother of all stories is going to drop and we're just going to destroy marriages, relationships. It's going to get personal."

He did not identify who would be the subject of the stories, referring only to "globalists".

On Friday US news website Axios, citing a source familiar with Breitbart's operations reported Mr Bannon planned to go "thermonuclear" against "globalists" who he believed was ruining the Trump administration.

Breitbart's senior-editor-at-large Joel Pollak: With Bannon gone, Trump's presidency could fail

An interview with conservative magazine the Weekly Standard, Mr Bannon said he had "my hands back on my weapons" after returning to Breitbart.

He added: "The Trump presidency that we fought for, and won, is over.

"We still have a huge movement, and we will make something of this Trump presidency. But that presidency is over. It’ll be something else. And there’ll be all kinds of fights, and there’ll be good days and bad days, but that presidency is over."

There was no sign of Mr Cernovich's promised "motherlode" in the 24 hours after Mr Bannon's departure from the White House, although he told viewers on Periscope: "Now that Bannon's out I can say whatever I want to say"

"I have been muzzled in a way by mutual friends".

The far-right social media personality is best known for pushing the 'Pizzagate' conspiracy theory, which wrongly alleged Hillary Clinton was involved in a child sex ring centred on a Washington restaurant.