New York (CNN) Michael Cohen, President Donald Trump's former personal attorney, on Wednesday asked a federal judge to reduce his three-year prison term while claiming that Attorney General William Barr and the Justice Department are biased against him.

Roger Adler, an attorney for Cohen, writes in the filing that Trump's former fixer has cooperated with federal, state and local prosecutors in New York but alleges the Justice Department has not treated Cohen in good faith.

"This lack of good faith, and disabling conflict of interest," he said, "should not be a barrier to recognizing defendant's substantial assistance to, and cooperation with, the government."

He asks for a court hearing to discuss his request to reduce the sentence to one year and a day or home confinement, as well as community service.

Adler accuses the prosecutors with the US Attorney's Office in the Southern District of New York, who did not support the request and have not agreed to meet with Cohen, of playing a game of "heads we win, tails you lose."

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