Even after the February 2014 fall of Ukraine's pro-Moscow President Viktor Yanukovych, who won office with the help of a Manafort-engineered image makeover, the American consultant flew to Kiev another 19 times over the next 20 months while working for the smaller, pro-Russian Opposition Bloc party. Manafort went so far as to suggest the party take an anti-NATO stance, an Oppo Bloc architect has said. A key ally of that party leader, oligarch Viktor Medvedchuk, was identified by an earlier Ukrainian president as a former Russian intelligence agent, "100 percent."

It was this background that Manafort brought to Donald Trump's presidential campaign, which he joined in early 2016 and soon led. His web of connections to Russia-loyal potentates is now a focus of federal investigators.

Manafort's flight records in and out of Ukraine, which McClatchy obtained from a government source in Kiev, and interviews with more than a dozen people familiar with his activities, including current and former government officials, suggest the links between Trump's former campaign manager and Russia sympathizers run deeper than previously thought.