Not only chief advisor for Trump white nationalism, Bannon is steering fascism in the UK, in case you missed this Wiki nugget.
I am sure more is to come about Bannon from Mueller as well.

European politics
Bannon has announced plans to move to Brussels for half the year to launch a new political operation to unite populist parties across Europe before the European Parliament election. He has formed a foundation for nationalist parties called The Movement.

Brazilian elections
In August 2018, Bannon met with Eduardo Bolsonaro, the son of far-right candidate Jair Bolsonaro, and serves as informal advisor to the Bolsonaro campaign in the Brazilian presidential elections.

Political beliefs
Bannon told Michael Lewis in February 2018, "We got elected on Drain the Swamp, Lock Her Up, Build a Wall. This was pure anger. Anger and fear is what gets people to the polls." He added, "The Democrats don't matter. The real opposition is the media. And the way to deal with them is to flood the zone with shit."

Individual issues
Bannon has advocated reductions in immigration and restrictions on free trade, particularly with China and Mexico. He is in favor of raising federal income taxes to 44% for those earning incomes over $5 million a year as a way to pay for middle class tax cuts.[49] He also supports significantly increasing spending on infrastructure, describing himself as "the guy pushing a trillion-dollar infrastructure plan". Bannon is opposed to government bailouts, describing them as "socialism for the very wealthy".[197] He generally believes in reducing the size of the federal bureaucracy, declaring at the Conservative Political Action Conference he favored the "deconstruction of the administrative state". However, he does support increased regulation of Internet companies like Facebook and Google, which he regards as akin to utilities in the modern age. He opposed the merger between Time-Warner and AT&T on antitrust grounds. He was a strong opponent of the Paris climate agreement within the administration, successfully persuading the President to withdraw from it.

On overseas military intervention
He is generally skeptical of military intervention abroad, opposing proposals for the expansion of U.S. involvement in the War in Afghanistan,[50] the Syrian Civil War, and the crisis in Venezuela. On the Middle East
Bannon strongly favors U.S. withdrawal from the Iran nuclear deal,[206] and was supportive of the approach taken by Saudi Crown Prince Mohammed bin Salman during the 2017 Qatar diplomatic crisis and the 2017 Saudi Arabian purge.[citation needed] He believes Qatar is "no less dangerous" than North Korea.

Bannon believes Iran, Turkey and China are forming a "new axis" to challenge the West, and has described Turkey as "the greatest danger facing the United States" and "far more dangerous than Iran".[208]

Bannon reportedly speaks often with Trump donor Sheldon Adelson, and has been alarmed at a push for a renewed Middle East peace process.[210] He has described Palestinian President Mahmoud Abbas as a "terrorist". He has advocated giving the land in the West Bank to Jordan and in Gaza to Egypt.

On the UK
Although Bannon initially favored the British National Party (BNP) and the English Defense League (EDL) in the United Kingdom, he later backed the UK Independence Party (UKIP).

Nigel Farage, the former leader of UKIP, once presented Bannon with a portrait of Bannon dressed as Napoleon Bonaparte. Bannon has encouraged Farage to return as leader of UKIP.

Bannon has called for the release of former EDL leader Tommy Robinson from prison, describing him as the "backbone" of Britain.

Bannon has also called for a revolt in the United Kingdom should the country adopt a soft Brexit, stating, "If I was in middle England and said this wasn't what I voted for I would rise up and make sure the guys in parliament knew it." When asked whether this should be interpreted as a "call to arms", he replied: "Absolutely".

Bannon has met with Jacob Rees-Mogg, a prospective candidate for the leadership of the country's Conservative Party, describing him as "one of the best thinkers in the conservative movement on a global basis."

Bannon has also urged Boris Johnson, another potential leadership contender, who Bannon said in July 2018 that he had known "over the last year" and was "very impressed" with, to challenge Prime Minister Theresa May. According to a Buzzfeed News report, Bannon was in private contact with Johnson during his visit to Britain that month, and the two men were previously in text communication during their respective tenures as White House Chief Strategist and British Foreign Secretary.