Paul Manafort, who served as the campaign chair for then-candidate Donald Trump's presidential campaign from March to August 2016, on Wednesday filed a lawsuit against the US Department of Justice (DOJ), Special Counsel Robert Mueller and Deputy Attorney General Rod Rosenstein.

The suit brought Wednesday in US District Court in Washington where Manafort and another former Trump campaign aide, Robert Gates, were charged, contends that the order Rosenstein signed to appoint Mueller "exceeds the scope of Mr. Rosenstein's authority to appoint special counsel as well as specific restrictions on the scope of such appointments" and challenges Mueller's decision to charge Manafort with alleged crimes that they say have nothing to do with the 2016 campaign, but rather relate to lucrative lobbying work Manafort and his deputy did for a former Russia-friendly government in Ukraine. That work ended in 2014, the suit says. Manafort and his deputy Rick Gates deny the allegations in the charges.

The focus is on a part of the Rosenstein order that says that Mueller may investigate "any matters that arose or may arise directly from the investigation." The Manafort lawyers say that goes beyond what the law allows Rosenstein to empower Mueller to do.

Further, the Rosenstein order gives Mueller "carte blanche to investigate and pursue criminal charges in connection with anything he stumbles across while investigating, no matter how remote from the specific matter identified as the subject of the appointment order," the lawsuit says.

Manafort and Gates was arrested in October and charged with money laundering and acting as an unregistered foreign agent during his work as a lobbyist for former Ukrainian president Viktor Yanukovych and his party of regions. None of the charges brought against Manafort pertain to his work with the Trump campaign.

The legal action represents the latest tack in a broader effort by supporters of the President to push back on the special counsel. Some Republicans have begun publicly calling for Mueller's probe to be shut down. Manafort's attorneys have echoed the President's criticism that Mueller's investigation into Russian meddling in the 2016 election is pursuing crimes that never happened.

Manafort and Gates face a total of 12 criminal charges related to money laundering and failure to file federal disclosures. Both Manafort and Gates have pleaded not guilty and are scheduled to appear again before the judge in the criminal case on January 16.

Full lawsuit below (pdf link)