U.S. Judge T.S. Ellis told a court that Manafort "is not before the court for anything having to do with colluding with the Russian government".
Manafort was convicted in August of five counts of filing false income tax returns, two counts of bank fraud and one count of failing to report a foreign bank account.
Federal sentencing guidelines had called for a term of roughly 20 years, but few observers had expected he would receive a sentence that long.
But District Judge TS Ellis said the sentencing guidelines were excessive and would create "an unwarranted disparity" with other cases. "When I was in the State Department, I met with all kinds of people, so you can triangulate and figure out what's happening". Even Ellis, at the outset of the case, speculated that prosecutors' true motive in prosecuting Manafort was to pressure him to provide evidence against Trump.
Their client, they said, acknowledges that he received a fair trial, accepts the jury's verdict and is "truly remorseful for his conduct". "My life, personally and professionally, is in shambles".
The filing was aimed at persuading a judge to reject Manafort's pleas for leniency at Thursday's sentencing hearing in Alexandria, Virginia.
Manafort is the only one of the 34 people and three companies charged by Mueller to have gone to trial. He has been jailed leading up to his sentencing.
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Waters has previously filed an inquiry for more information on Trump's finances to Deutsche Bank, which Democrats like Rep. Trump said they could have held it a few days later and had more time to prepare.
Government lawyers countered that Manafort's millions were built on a criminal enterprise in which he hid tens of millions of dollars in foreign income and failed to pay more than $6 million USA in taxes. After pro-Kremlin Ukrainian President Viktor Yanukovych's ouster, prosecutors said, Manafort lied to banks to secure loans and maintain an opulent lifestyle with luxurious homes, designer suits and even a $15,000 ostrich-skin jacket. Prosecutors have said the work in Ukraine was on behalf of politicians who were closely aligned with Russian Federation, though Manafort has insisted his work helped those politicians distance themselves from Russian Federation and align with the West. Ellis rejected those efforts.
Manafort has also been charged in Washington with money laundering, witness tampering and other offences and faces separate sentencing in that case on March 13.
But Mr Manafort still faces sentencing in a second case in Washington next week, where the maximum penalty is 10 years and the judge has appeared more sympathetic to prosecutors.
Defence attorneys also complained that Manafort was unfairly snared by special counsel Mueller's investigation into whether Russian Federation meddled on Trump's behalf during the 2016 presidential campaign.
Mueller's office has not taken a position on a specific sentence for Manafort, but it has made clear that it believes his crimes are serious and merit punishment.
His promise to cooperate in exchange for lighter sentencing fell apart soon after, with Mueller accusing Manafort in November of repeatedly lying to federal investigators. If not, Waxman said, then today's verdict is "definitely a victory for Paul Manafort and for President Trump".
"The defendant blames everyone from the Special Counsel's Office to his Ukrainian clients for his own criminal choices", prosecutors said.