Special counsel Robert MuellerRobert (Bob) Swan MuellerKamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Kamala Harris says her Justice Dept would have 'no choice' but to prosecute Trump for obstruction Dem committees win new powers to investigate Trump MORE is asking for 150 blank subpoenas in the case surrounding former Trump campaign chairman Paul ManafortPaul John ManafortNew York activists go on hunger strike to advocate for ending solitary confinement New York activists go on hunger strike to advocate for ending solitary confinement House panel subpoenas Flynn, Gates MORE

The request would cover 75 potential subpoenas for witnesses, according to the Washington Examiner, which added that recipients must appear on July 25 to testify.

The request for the subpoenas was filed Tuesday in Virginia, where Manafort resides. 

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The special counsel also filed a request for 70 blank subpoenas in May.

Manafort is facing charges including failing to register as a foreign agent as part of the special counsel's investigation into Russia's election meddling and possible collusion between President TrumpDonald John TrumpTrump defends Stephanopolous interview Trump defends Stephanopolous interview Buttigieg on offers of foreign intel: 'Just call the FBI' MORE's campaign and Moscow.

He is also facing tax fraud charges and is accused of not reporting foreign bank accounts.  

Mueller, earlier this month, accused Manafort of attempting to tamper with witnesses while on pretrial release. 

Manafort will appear in court Friday, when Mueller's team will argue that he be sent back to jail in light of the allegations of witness tampering.