Former White House chief strategist Stephen Bannon reportedly attacked the House investigation into Russia’s interference in the 2016 presidential election as an attempt to delegitimize President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE’s victory during his testimony on Tuesday.

Rep. Tom Rooney Thomas (Tom) Joseph RooneyHouse Dem calls on lawmakers to 'insulate' election process following Mueller report Hill-HarrisX poll: 76 percent oppose Trump pardoning former campaign aides Dems fear Trump is looking at presidential pardons MORE (Fla.), one of the top Republicans on the House Intelligence Committee, told Politico that Bannon made the remark during his 10-plus hour testimony before the committee.

The former Trump strategist blasted the committee’s investigation as an attempt to “decertify the last election,” according to Rooney.

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Rooney also told Politico that he would “have to consider” whether or not to hold Bannon in contempt of Congress for refusing to answer some of the committee’s questions.

Bannon was slapped with a subpoena in the middle of his testimony Tuesday after he declined to answer some questions posed by lawmakers.

Multiple sources told The Hill Tuesday that Bannon indicated to lawmakers that he would answer questions about the Trump campaign, but not about his work on the transition team or in the White House. Bannon, alongside his lawyer, said he would only answer those questions when he speaks to 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.

That stance infuriated lawmakers. Sources described the meeting as a “total free-for-all” and “brutal.”

The Associated Press reported Wednesday that Bannon's attorney, Bill Burck, was communicating with the White House counsel's office via phone during Bannon’s testimony to check on whether it would allow Bannon to answer certain questions.

Rep. Adam Schiff Adam Bennett SchiffTop Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence Overnight Defense: Top admiral says 'no condition' where US should conduct nuclear test 'at this time' | Intelligence chief says Congress will get some in-person election security briefings Overnight Defense: House to vote on military justice bill spurred by Vanessa Guillén death | Biden courts veterans after Trump's military controversies MORE (Calif.), the top Democrat on the committee, described the effort as a "gag order by the White House" and said Bannon "was instructed by the White House to refuse again to answer any questions concerning the time during the transition and his time in the administration.”

But White House chief of staff John Kelly John Francis KellyMORE pushed back on Schiff’s remarks Wednesday, saying the White House did not tell Bannon to invoke executive privilege and refuse to answer questions during the meeting.

Bannon has also been subpoenaed by Mueller and is reportedly set to fully cooperate with his investigation.