Paul Manafort has worn many hats: an international political operative, President Donald Trump's former campaign chairman, Trump confidant Roger Stone's business partner and now government witness.
Federal authorities had cornered the man they suspected could be part of Russia's interference in the 2016 presidential election -- and they might have been more successful in their investigation in early 2017 if it had not been for George Papadopoulos, the special counsel alleged on Friday.
