Former Trump campaign manager Paul Manafort arrives for arraignment on a third superseding indictment against him by Special Counsel Robert Mueller on charges of witness tampering, at U.S. District Court in Washington, U.S. June 15, 2018.

The bad news just keeps on coming for former Trump campaign boss Paul Manafort.

A federal judge in Washington on Thursday rejected Manafort's request to bar as evidence business records seized by the FBI from a self-storage unit he was using in Virginia a day after agents got access to the unit from Manafort's assistant on May 27, 2017.

The ruling comes a week after the same judge, Amy Berman Jackson, revoked Manafort's $10 million bail and ordered him jailed after prosecutors charged he tried to tamper with a potential witness for his upcoming criminal trials.

Jackson on Thursday also issued a directive to the Justice Department that Manafort should be confined to a jail separate, "to the extent practicable from persons awaiting or serving sentences, or being held in custody pending appeal."

Manafort's lawyers had argued that the files seized from the storage locker should not be allowed to be used at his trial before Jackson on the grounds that the search was illegal.

The lawyers noted that "agents entered the storage unit and looked around without a warrant the day before they presented their request for a warrant to the court," Jackson wrote in her order Thursday.