A federal grand jury returned the indictment in a significant victory for the House Select Committee to Investigate the January 6 Attack, which is battling efforts by Trump and top aides to use presidential privilege to block testimony and documents necessary for the probe.

The indictment came hours after Trump’s former chief of staff, Mark Meadows, declined to show up for a committee deposition after being subpoenaed, which could lead to similar charges of contempt.

Investigators think Meadows and Bannon could have information on links between the White House and the Trump supporters who invaded the Capitol to prevent the certification of Joe Biden as the winner of the November 2020 presidential election.

Bannon, 67, was charged with two counts of contempt — for ignoring subpoenas to appear for a deposition and for failing to supply documents to the committee.

Each count carries a penalty of one month to one year in jail.

“Steve Bannon’s indictment should send a clear message to anyone who thinks they can ignore the Select Committee or try to stonewall our investigation: no one is above the law,” said committee Chair Bennie Thompson and Vice-Chair Liz Cheney in a statement.

According to CNN, Bannon plans to turn himself into the Justice Department on Monday.