On Friday, Bannon was found guilty of two contempt of Congress charges after his attempts to delay the trial were denied.
"Mr. Bannon had an obligation to appear before the House Select Committee to give testimony and provide documents," Matt Graves, the Biden-appointed US attorney in Washington, DC, said, hailing the verdict. "His refusal to do so was deliberate and now a jury has found that he must pay the consequences."
Bannon, whose sentencing is set for October, has vowed to appeal the decision.
After the verdict, he said he was willing to go to prison if it meant standing by Trump and refusing to comply with the committee.
"I support Trump and the Constitution and if they want to put me in jail for that, so be it," Bannon said on Fox News.