washington fbi u.s. justice department investigate possible u.s. tie allege corruption involve former president ukraine include work firm head political operatives paul manafort tony podesta cnn report friday cite multiple u.s. law enforcement officials broad-based investigation look whether u.s. company financial system use enable corruption party former pro-russian ukrainian president viktor yanukovych cnn say person answer telephone number manafort say manafort available comment person say associate manafort give name david refer query lawyer washington immediately respond phone call email response report new york time monday manafort deny impropriety statement never receive single off-the-books cash payment falsely report new york time ever do work governments ukraine russia say new york time report receive cash payments worth 12 million five years itemize secret ledgers belong yanukovich party regions manafort resign chairman republican presidential nominee donald trump campaign friday focus probe cnn say cite officials probe look work firm link former ukrainian government include podesta group lobby public relations company head tony podesta whose brother john podesta chairman campaign elect democratic party presidential nominee hillary clinton manafort attorney richard hibey immediately respond request comment fbi decline comment cnn report podesta group hire independent legal firm investigate whether mislead centre modern ukraine not-for-profit group link oust ukrainian government spokeswoman group say statement justice department ask comment report say remain commit help recover steal assets behalf people ukraine investigators ukraine say yanukovych party engage widespread corruption flee russia follow popular uprise 2014. fbi probe possible u.s. tie corruption former ukraine president cnn