The Senate Judiciary Committee will subpoena documents from former Trump campaign chairman Paul Manafort as part of its ongoing investigation into Russian meddling in the 2016 presidential election, according to the panel's top Democrat.

Sen. Dianne Feinstein Dianne Emiel FeinsteinBiden leads Trump by 12 points among Catholic voters: poll Names to watch as Trump picks Ginsburg replacement on Supreme Court McConnell says Trump nominee to replace Ginsburg will get Senate vote MORE (D-Calif.) told The Washington Post that the committee has reached an agreement to subpoena documents from Manafort, but wouldn't specify what the documents relate to. The move comes just two months after the committee dropped a subpoena for Manafort to testify publicly after he agreed to staff member interviews.

At the time, Feinstein and committee Chairman Chuck Grassley Charles (Chuck) Ernest GrassleyGardner signals support for taking up Supreme Court nominee this year Grassley, Ernst pledge to 'evaluate' Trump's Supreme Court nominee McConnell digs in on vow to fill Ginsburg's Supreme Court seat MORE (R-Iowa) said that they wouldn't hesitate to subpoena Manafort in the future if he ceased to cooperate with the committee's requests. The Post's report notes that Manafort has been unresponsive to requests from the Judiciary Committee in recent weeks.

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"We will not issue subpoenas for them tonight requiring their presence at Wednesday’s hearing but reserve the right to do so in the future," Feinstein and Grassley said in July.

Last week, it was revealed that Manafort offered a Russian billionaire private briefings on the 2016 race during the election. He is also at the center of special counsel Robert Mueller's investigation and in July had his house raided by FBI agents. During that raid, he was reportedly told to expect an indictment by prosecutors on Mueller's team.

Manafort said last month that he was cooperating with all inquiries, including the Judiciary Committee investigation.

"Mr. Manafort has consistently cooperated with law enforcement and other serious inquiries and did so on this occasion as well," Manafort's spokesperson said in August.