Far right Representatives Marjorie Taylor Greene, Lauren Boebert and Madison Cawthorn allegedly helped plan the attack.
Criminal charges from Congress have never been filed against someone who has asserted executive privilege protections.
Rep. Adam Schiff, a Democrat from California, said “the point” of Trump’s lawsuit is to delay the commission’s work.
A vote on holding Bannon in contempt of Congress could come as early as Tuesday.
Trump can still sue to block the commission from obtaining his documents, but legal experts say such a suit would fail.
Trump’s continued grip on the GOP makes investigations into the January 6 attack vital to safeguarding democracy.
At least two former Trump aides appear to be cooperating with the January 6 commission’s investigation.
Has the idea of autocratic overthrow been in Trump’s head all along?
The report details the depths of the pressure campaign that Trump and his allies waged on the Justice Department.
The former aides have been ordered to hand over documents by Thursday, and to testify later this month.