Stephen Bannon, President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE’s former campaign CEO and senior White House strategist, will testify in Roger Stone Roger Jason StoneFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. The agony of justice Our Constitution is under attack by Attorney General William Barr MORE’s trial on charges of witness tampering, obstruction and making false statements.

Jurors were informed Wednesday that Bannon would appear in court to explain his interactions with Stone late in the 2016 election season, after the longtime Trump ally connected with Bannon to exchange information on stolen emails from the Democratic National Committee.

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“I do know how to win this but it ain’t pretty,” a message from Stone to Bannon at the time said.

Richard Gates, a former senior Trump campaign aide, is also expected to testify.

In their opening statement, federal prosecutors accused Stone of lying to congressional investigators about his connections with both WikiLeaks and the Trump campaign in order to defend the president.

“The evidence in this case will show that Roger Stone lied to the House Intelligence Committee because the truth looked bad — the truth looked bad for the Trump campaign and the truth looked bad for Donald Trump,” Aaron Zelinsky said.

Stone has pleaded not guilty to seven counts related to his September 2017 testimony in front of the House Intelligence Committee.

Stone was arrested by FBI officials in January as part of special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE’s investigation into Russia's election interference, which included the theft and leaking of the Democratic emails.