Steve Bannon may have been one of Donald Trump’s first, most exuberant supporters, but he was never fond of the businessman’s Vice President, reports claim.

Emails obtained by BuzzFeed News show Mr Bannon slamming Mr Pence as an “unfortunate necessity,” just one month before the former Breitbart News chief took over as Mr Trump's campaign manager.

On the same day Mr Trump announced Mr Pence as his running mate, Breitbart's former technology editor Milo Yiannopoulos wrote to Mr Bannon, calling the Indiana governor a “bad pick”.

“Should I tweet something ambivalent about him?” Mr Yiannopoulos wrote, according to BuzzFeed. “People are telling me Trump likely didn't want this. ...What's our party line on this?"

"This is the price we pay for cruzbots and #nevertrump movement,” Mr Bannon responded, referring to Mr Trump’s Republican detractors. “An unfortunate necessity...very. feel free to do whatever u want. we, as always, will remain above it all."

In pictures: Protests, pomp and Donald Trump Show all 30 1 /30 In pictures: Protests, pomp and Donald Trump In pictures: Protests, pomp and Donald Trump President-elect Donald Trump acknowledges guests as he arrives on the platform at the US Capitol in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Donald Trump is sworn in as the 45th president of the United States by Chief Justice John Roberts as Melania Trump looks on during the 58th Presidential Inauguration at the U.S. Capitol in Washington AP In pictures: Protests, pomp and Donald Trump President Donald Trump shakes hands with Justice John Roberts after taking the oath at inauguration ceremonies swearing in Trump as the 45th president of the United States Reuters In pictures: Protests, pomp and Donald Trump President Donald Trump raises his fists after his inauguration on the West Front of the U.S. Capitol Getty In pictures: Protests, pomp and Donald Trump U.S. President-elect Donald Trump greets outgoing President Barack Obama before Trump is inaugurated during ceremonies on the Capitol in Washington Reuters In pictures: Protests, pomp and Donald Trump resident-elect Donald Trump arrives on the platform of the US Capitol in Washington DC Getty Images In pictures: Protests, pomp and Donald Trump Attendees partake in the inauguration ceremonies to swear in Donald Trump as the 45th president of the United States at the U.S. Capitol in Washington DC Reuters In pictures: Protests, pomp and Donald Trump US President Donald Trump delivers his inaugural address during ceremonies at the US Capitol in Washington DC Getty In pictures: Protests, pomp and Donald Trump U.S. President Donald Trump waves with wife Melania during the Inaugural Parade in Washington DC Reuters In pictures: Protests, pomp and Donald Trump Protesters registered their rage against the new president Friday in a chaotic confrontation with police who used pepper spray and stun grenades in a melee just blocks from Donald Trump's inaugural parade route. 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Mr Bannon would not, of course, remain above it all. One month later, he would take over as manager of the Trump campaign, helping the candidate to his surprise victory. In the White House, as a top adviser to the President, Mr Bannon would successfully implement many of his nationalist, isolationist policy ideas.

At the same time, Mr Bannon clashed with the more “traditional” elements of the White House. While he never publicly feuded with Mr Pence – the Vice President once called him a “very highly valued” staffer – the adviser made it clear he would not tolerate anyone who opposed his nationalist agenda.

But Mr Bannon was pushed out of his White House role two months ago, after General John Kelly took over as Chief of Staff. Now, as a free agent with a newly high profile, Mr Bannon has declared “war” on the Republican establishment – generally understood to include politicians like House Speaker Paul Ryan, Senate Majority leader Mitch McConnell, and Mr Pence.

“There’s a new game in town,” Mr Bannon recently told Fox News’ Sean Hannity. “We are to cut off the oxygen to Mitch McConnell. Mitch McConnell’s biggest asset is the money. We’re going to make it the biggest liability. We are going after these guys tooth and nail.”

Mr Bannon said he and his team have been working with grassroots organizers to identify anti-establishment candidates whose campaigns they could support.