Special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe MORE is asking for 150 blank subpoenas in the case surrounding former Trump campaign chairman Paul ManafortPaul John ManafortVirginia judge calls Manafort’s plea deal ‘highly unusual,’ but is it? Three reasons Mueller may not charge Trump with obstruction Judge calls Manafort plea deal 'highly unusual' 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 TrumpKey takeaways from the Arizona Senate debate Major Hollywood talent firm considering rejecting Saudi investment money: report Mattis says he thought 'nothing at all' about Trump saying he may leave administration 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.