WASHINGTON — One day before a mob of former President Donald J. Trump’s supporters stormed the Capitol, Stephen K. Bannon, a former top adviser to Mr. Trump, made a prediction to listeners of his radio show.
“Now we’re on, as they say, the point of attack — the point of attack tomorrow,” Mr. Bannon said on Jan. 5 as he promoted a plan hatched by Mr. Trump and far-right Republican lawmakers to try to overturn President Biden’s victory the next day, when Congress would meet to formalize the election results. “It’s going to kick off. It’s going to be very dramatic.”
It is because of comments like that, which foreshadowed the violence that played out during the Capitol riot, that the House committee investigating the assault is interested in questioning Mr. Bannon. But the former counselor to Mr. Trump has refused to cooperate with the inquiry, citing the former president’s claim of executive privilege.
The panel on Tuesday voted unanimously to recommend charging Mr. Bannon with criminal contempt of Congress for defying its subpoena, sending the matter to the House, which is expected to approve the move and hand the matter over to the Justice Department for prosecution.
“The rule of law remains under attack right now,” said Representative Bennie Thompson, Democrat of Mississippi and the chairman of the committee. “Mr. Bannon will comply with our investigation, or he will face the consequences.”
Mr. Thompson said he expected the full House to “quickly” take up the matter.
The high-profile confrontation is the first of several that promise to test the boundaries of executive privilege — the presidential prerogative to keep official communications secret — and will determine how far the House committee will be able to go in uncovering the story behind the deadliest attack on the Capitol in two centuries.
Mr. Trump has filed his own federal lawsuit that touches on similar questions, suing both the chairman of the investigative committee and the head of the National Archives, the custodian of his presidential records, to block the release of material the panel has requested.
Many Democrats fear that case, as well as any the Justice Department might decide to bring against Mr. Bannon, may drag on for months, potentially long enough for Republicans to gain the House majority in 2022 and bury the inquiry — and with it, any hope of revealing fresh information about what precipitated the riot.
Members of the committee, which is controlled by Democrats, believe that Mr. Bannon has crucial information about plans to undermine Mr. Biden’s victory, including conversations Mr. Bannon had with Mr. Trump in which he urged the former president to focus his efforts on Jan. 6.
In a report recommending the House find Mr. Bannon in contempt, the committee repeatedly cited comments he made on his radio show on Jan. 5 — when Mr. Bannon promised “all hell is going to break loose tomorrow” — as evidence that “he had some foreknowledge about extreme events that would occur the next day.”
Investigators wrote that Mr. Bannon appeared to “have had multiple roles relevant to this investigation,” including in constructing the “Stop the Steal” public relations effort to spread the lies of a fraudulent election that motivated the attack, and participating in events from a ‘‘war room” organized at a Washington, D.C., hotel with other allies of Mr. Trump who were seeking to overturn the election.
The group included members of the Trump campaign’s legal team, including Rudolph W. Giuliani and John C. Eastman; and prominent proponents of false election fraud claims, including Russell Ramsland Jr. and Boris Epshteyn; as well as Trump ally Roger J. Stone Jr., who left the hotel with members of the Oath Keepers militia group acting as bodyguards, the committee wrote.
“It’s not going to happen like you think it’s going to happen,” Mr. Bannon told his audience on Jan. 5. “It’s going to be extraordinarily different. And all I can say is: Strap in.”
Robert J. Costello, Mr. Bannon’s lawyer, has informed the committee that his client would not comply, citing Mr. Trump’s directive for his former aides and advisers facing subpoenas to invoke immunity and refrain from turning over documents that might be protected under executive privilege.
Late Monday, Mr. Bannon and his lawyer sought to delay the vote, citing Mr. Trump’s lawsuit seeking to block the disclosure of White House files related to his actions and communications surrounding the Jan. 6 Capitol riot. Mr. Thompson quickly denied the request for a delay.
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Under federal law, any person summoned as a congressional witness who refuses to comply can face a misdemeanor charge that carries a fine of $100 to $100,000 and a jail sentence of one month to one year.
During the Tuesday committee meeting, Representative Liz Cheney, Republican of Wyoming and the committee’s vice chairwoman, directed a comment to her Republican colleagues, warning them that following Mr. Trump’s lies was a prescription for “national self-destruction.”
“Almost all of you know in your hearts that what happened on Jan. 6 was profoundly wrong,” she said. “You know that there is no evidence of widespread election fraud sufficient to overturn the election; you know that the Dominion voting machines were not corrupted by a foreign power. You know those claims are false.”
