The Bannon 302 also references an email from Erik Prince, recommending Bannon to meet with "Oleg."
Presumably that refers to Oleg Deripaska. Bannon said he had no recollection of such a meeting.
This appears to link Erik Prince to Oleg Deripaska, and suggests an attempt to link Deripaska with the campaign in person, not just through Manafort.
As the Mueller report lays out, Manafort essentially worked for Oleg Deripaska while he was on the campaign. He told Deripaska's liaison Kilimnik that he was willing to provide "private briefings" on the campaign to Deripaska. In order to "get whole" with Deripaska, in other words settling a debt, he conducted the type of activties you'd typically expect from a spy.
Throughout his time as campaign manager, and afterwards via Rick Gates, Manafort collected private Trump campaign polling data and periodically gave it to Kilimnik across a span of several months. It was understood that Kilimnik would then provide it to Oleg Deripaska. On August 2 2016, Kilimnik was given a full walkthrough of the data and also received a briefing on the campaign's strategy for several key battleground states.
Kilimnik flew back to Moscow the next day.
Gates believed Kilimnik was a spy, and the Mueller report states that Kilimnik was a former GRU officer with active Russian intelligence ties in 2016.
In his communications with Kilimnik, Manafort and Kilimnik also reference Deripaska's deputy Viktor Boyarkin.
More specifically, Kilimnik emailed Manafort "Yes, I have been sending everything to Victor, who has been forwarding the coverage directly to OVD."
This was in response to Manafort emailing Kilimnik to ask if "the OVD operation" had seen all the articles about his new position as Trump campaign chairman. "How do we use to get whole?", Manafort said, referring to leveraging his position to pay off his debt to Deripaska.
Like Kilimnik, Boyarkin is a former GRU officer. He also served as a defense attachee for the Russian Embassy in the US.
Boyarkin was sanctioned by the Trump administration Treasury Dept.
https://home.treasury.gov/news/press-releases/sm577
Boyarkin himself publicly boasted of the work Manafort was doing for him and Deripaska.
https://time.com/5490169/paul-manafort-victor-boyarkin-debts/
To date, Trump has never publicly criticized Manafort for literally spying on his campaign on behalf of Deripaska, Boyarkin and Kilimnik. The complete opposite in fact. Trump publicly praised him while the jury was deliberating Manafort's felony convictions. He subsequently praised him for "refusing to break, unlike Michael Cohen" while Manafort was under indictment for obstruction of justice in the Mueller investigation.
When Manafort started cooperating, Trump publicly said in November 2018 that a pardon for Manafort was still on the table.
During said cooperation, Manafort's lawyer Kevin Downer maintained a joint defense agreement with Trump and briefed the Trump attorneys on what the Special Counsel prosecutors were asking Manafort about.
During this time, Manafort was also repeatedly lying to prosecutors, all while his attorney was in touch with Trump's legal team.
Members of Trump's legal team such as Giuliani have since continued to defend Manafort despite him sabotaging his own plea deal to continue lying to prosecutors and prevent them from learning the full scope of his interactions with Kilimnik.
As the Rick Gates 302 lays out, it was Manafort who came up with the theory that Ukraine was responsible for the DNC hack instead of Russia. According to Gates, Manafort brought this up back in 2016.
Trump is now pressuring the Ukrainian president Zelensky to investigate Manafort's assertion and thereby exculpate Russia.