Photo: Paul Manafort has been accused of working with a Russian colleague on an opinion piece. (AP: Alex Brandon)
Donald Trump's former campaign manager Paul Manafort has been working on an op-ed essay with a longtime colleague "assessed to have ties" to a Russian intelligence service, according to court papers filed by prosecutors working for special counsel Robert Mueller.
In the court filing, prosecutors say Mr Manafort and the colleague sought to publish the op-ed under someone else's name and intended it to influence public opinion about his work in Ukraine.
The op-ed was being drafted as late as last week, with Mr Manafort currently under house arrest.
Prosecutors did not name the colleague, but noted the person is based in Russia.
Mr Manafort is currently facing several felony charges involving allegations of money laundering and other financial crimes related to his political consulting work in Ukraine.
He has been confined to his home while he works out a bond arrangement with the Government.
In the court filing, prosecutors say the op-ed appeared to violate an admonishment from the judge last month to refrain from public statements.
"Even if the ghostwritten op-ed were entirely accurate, fair, and balanced, it would be a violation of this Court's November 8 Order if it had been published," the prosecutors wrote.
"The editorial clearly was undertaken to influence the public's opinion of defendant Manafort, or else there would be no reason to seek its publication [much less for Manafort and his long-time associate to ghostwrite it in another's name].
"It compounds the problem that the proposed piece is not a dispassionate recitation of the facts."
Mr Manafort has denied any wrongdoing related to his work in Ukraine.
A spokesman for Mr Manafort did not immediately respond to a request for comment.
Prosecutors said they discovered the efforts to publish the op-ed last Thursday and alerted Mr Manafort's attorney, who assured prosecutors that "steps would be taken to make sure it was it was no longer going to be published".
Prosecutors did not disclose the op-ed in court papers so as to prevent it from becoming public.
They also did not disclose what name the ghostwritten op-ed would have been published under.
Mr Manafort and his longtime business associate, Rick Gates, were indicted in October by a grand jury in Washington.
They were among the first people to face charges brought by the special counsel's office.
Mr Manafort led the Trump campaign for several months, including during the Republican National Convention.
Mr Gates also worked in a senior role in the campaign.