Donald Trump’s former campaign chairman was working with a former Russian spy during the US presidential race over debts he owed to a Kremlin-linked oligarch, it has been claimed. Paul Manafort led Mr Trump’s campaign for president for three months in 2016 before he was forced to resign after his links to Russian interests in Ukraine were made public. Now a former member of the GRU, Russia’s most feared and secretive spy service, has said he was in contact with Manafort during that time over millions of dollars the political adviser allegedly owed to billionaire businessman Oleg Deripaska.