Jackson on Feb. 13 ruled that Manafort had breached his agreement to cooperate with Mueller's office by lying to prosecutors about three matters pertinent to the Russia probe including his interactions with a business partner they have said has ties to Russian intelligence.

Mueller is preparing to submit to US Attorney General William Barr a report on his investigation into whether Trump's campaign conspired with Russia and whether Trump has unlawfully sought to obstruct the probe. Trump has denied collusion and obstruction and Russia has denied election interference.

The crimes for Manafort was convicted did not directly relate to the 2016 election.

STUNNING DOWNFALL

The sentencing capped a stunning downfall for Manafort, a prominent figure in Republican Party circles for decades who also worked as a consultant to such international figures as former Angolan rebel leader Jonas Savimbi, former Philippine President Ferdinand Marcos and Yanukovych.

Manafort worked for Trump's campaign for five pivotal months in 2016 that included the Republican National Convention where Trump accepted the Republican presidential nomination, three of them as campaign chairman.