Paul Manafort, President Donald Trump's former campaign chairman, leaves Federal District Court, in Washington, November 2017. Credit: Andrew Harnik | AP

A federal judge has ordered prosecutors to tell Paul Manafort by Friday the names of the European politicians and unidentified “others” that investigators allege were part of Manafort’s secret lobbying campaign for Ukraine.

The deadline falls on the same day that U.S. District Judge Amy Berman Jackson of the District of Columbia is set to decide whether to jail President Donald Trump’s former campaign manager while he awaits trial after prosecutors say he tampered with witnesses in the ongoing cases.

In a five-page order Tuesday, Jackson mostly denied Manafort’s challenge to the legal adequacy of his indictment in the District for conspiracy and money laundering brought by special counsel Robert Mueller III.

Jackson found the charges sufficiently “specific” and enough “to put the defendant on notice of the nature of the charges against him.”

However, Jackson found what she called “one minor exception” in saying Manafort’s legal team should be given the names of the politicians and others to help him prepare for “a complex trial with a voluminous record within a relatively short period of time.”

Prosecutors contend that Manafort conspired with three public relations firms, a law firm and others to advocate on behalf of the Ukraine government in 2012 but did not register in the United States as a lobbyist for a foreign government.

The judge said Manafort “should not have to be surprised at a later point by the addition of a new name or allegation.”

Manafort, 69, has pleaded not guilty to indictments in Washington and Alexandria, Virginia, on charges that he laundered more than $30 million in a decade of undisclosed lobbying for Ukraine, as well as to tax and bank fraud charges. He has been in home detention since he was charged in October in Mueller’s continuing investigation.

Manafort had been close to getting court approval for a $10 million bail deal that would have freed him from electronic monitoring and other restrictions.

But ahead of that decision, Mueller’s office filed court papers accusing Manafort of witness tampering and asked a judge to revise or revoke conditions of his release. Prosecutors followed up Friday with a fresh indictment charging Manafort and Konstantin Kilimnik, 47, a longtime business associate, of conspiring to obstruct justice by swaying testimony from potential witnesses about the lobbying work to make it appear that it did not involve American officials.

Kilimnik, who was not previously charged, is believed to be in Moscow and probably safe from arrest because Russia does not extradite its citizens.

Late Tuesday evening, prosecutors argued in a separate filing that the two witness tampering counts handed up by the grand jury “conclusively determine the existence of probable cause” to believe that Manafort violated his release terms and should be jailed. If so, Manafort would have to rebut the presumption that no alternative would assure the public’s safety. Prosecutors cited an additional email from a potential witness and draft memo by Manafort from 2013 discussing their lobbying of U.S. officials.

Manafort’s trial is scheduled for July in Alexandria and September in Washington.

His alleged financial crimes largely predate his time on the Trump campaign.

Follow the Bangor Daily News on Facebook for the latest Maine news.