An editor at Breitbart says that his publication is going to “war” with the White House now that former chief strategist Steve Bannon is out of the picture.

Joel Pollak, an editor for Breitbart in California, made the statement with a simple tweet, after it was announced that Mr Bannon had tendered his resignation to Donald Trump.

Strategist Steve Bannon leaves Trump's turbulent White House

“#WAR,” Mr Pollak wrote, echoing similar sentiments reportedly made by people connected to Breitbart.

That harsh response is apparently in response to a significant shift in power away from anti-globalists — a group of which Mr Bannon is a member — and so-called globalists like Mr Trump’s son-in-law and adviser Jared Kushner. Throughout Mr Trump’s presidency, Mr Bannon and Mr Kushner have reportedly battled for influence over their boss.

"It's now a Democrat White House," a Breitbart source reportedly told journalist Gabriel Sherman.

Mr Bannon had pushed for nationalist policies, and was generally opposed to military intervention in Syria. Mr Kushner and his circle, on the other hand, have argued that military intervention in Syria is necessary to punish the Syrian regime for alleged use of chemical weapons.

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News of that infighting had previously led individuals affiliated with the far-right Breitbart news site to claim that firing Mr Bannon would lead to “open warfare” between the website and Mr Trump.

“It would be open warfare from the outside in,” former Breitbart employee Kurt Bardella said in April.

“And all of the sudden the pages of Breitbart, who have been incredibly generous to Donald Trump to say the least, will start turning their fire on him or, at the very least, assign blame saying Trump betrayed the conservative right because of Jared Kushner and liberal Democrats inside the White House have turned them against us,” he said.