Former White House chief strategist Steve Bannon is expected to testify against Roger Stone.
The prosecution has commanded Bannon to testify, after fighting off earlier subpoenas, according to a source with firsthand knowledge.
Stone is on trial for lying to the House Intelligence Committee, witness tampering, and obstruction of justice during the Mueller probe. He denies all wrongdoing.
“This case is not about who hacked the DNC’s servers. This case is not about whether Roger Stone had any communication with any Russians. This case is not about politics,” prosecutors said. “This case is about Roger Stone’s false testimony to the House Intelligence Committee.”
Former top Trump campaign official Rick Gates was also set to testify against Stone.
Bannon, Gates and Stone were all key figures in Mueller’s investigation into whether Russia interfered in the 2016 presidential election.
Gates pleaded guilty in the Mueller probe and is awaiting sentencing. He previously testified against former Trump campaign chairman Paul Manafort.