Donald TrumpRobert Mueller Russian oligarch Oleg Deripaska, reportedly stopped trying to recover money he said had been taken from him in 2014 by Paul Manafort after President Donald Trump won the GOP nomination last year. The detail, first reported by The Associated Press in March, may shed light on an email Manafort — then Trump's campaign chairman — sent last July from his campaign email address. In the email, he asked longtime employee Konstantin Kilmnik to offer Deripaska "private briefings" about the campaign. “If he needs private briefings we can accommodate,” Manafort wrote. Those emails are being examined as part of special counsel Robert Mueller's investigation into Russian election interference and whether the Trump campaign played any part.