Special counsel Robert Mueller has cleared the way for former Trump campaign manager Paul Manafort and President Trump's eldest son, Donald Trump Jr., to testify before the Senate Judiciary Committee, according to Sen. Dianne Feinstein.

Feinstein, D-Calif., said Tuesday that Mueller "has transcribed back that he didn't have a problem with our seeking public testimony" from both men.

Peter Carr, a spokesman for Mueller's team, declined to comment.

Sources close to Manafort said he is non-committal about testifying at this time.

The statement from the panel's top Democrat comes after Senate Judiciary Chairman Chuck Grassley, R-Iowa, said last week he would call both Manafort and Trump Jr. to testify before the committee, and would subpoena the former if necessary.

"If conflicts exist, then Chairman Grassley is prepared to work with Special Counsel Mueller to find a way for the committee to proceed with its oversight responsibility," said Grassley spokesman Taylor Foy last week.

Mueller is in charge of the special counsel investigation of Russian meddling in the 2016 presidential election as well as possible collusion with the Trump campaign.

The Senate Judiciary Committee is one of several congressional panels also conducting its own investigation into Russia.