The former Breitbart News boss warned the White House was not taking the threat of impeachment seriously enough and said House Speaker Nancy Pelosi was “very focused” about getting the process underway. Mr Bannon told the New York Post: “This is serious. As sure as the turning of the earth, he is going to be impeached.”
And he warned a lack of co-ordination in the White House’s response to the threat was doing little to help Mr Trump’s cause.
He said: “The problem we have is that the President needs a team around him and somebody has got to step up and make a play.
“Trump can’t do everything. There is just no coordination with the team.
“The fake news and witch hunt stuff is not working.”
Mr Bannon said Mr Trump should “augment the legal team”.
He said: “You need a team put together than can focus on impeachment 24/7.”
Politicians leading the Trump impeachment inquiry are expected to hear another round of crucial testimony this week, including from the acting ambassador to Ukraine who had raised concerns that security aid was being withheld to apply improper political pressure.
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Veteran State Department officer William Taylor and at least four other witnesses will be the latest in a parade of career diplomats and current and former US officials to speak before congressional committees, despite the objections of a Republican White House deriding the Democratic-led proceedings as a “kangaroo court.”
The fast-developing inquiry has cast a new cloud of legal troubles over Mr Trump’s presidency, contributing to unease among fellow Republicans at a time when some have already been critical of his abrupt decision to remove US troops from northeastern Syria.
Mr Taylor, whose closed-door testimony is set for tomorrow, could be one of the most important witnesses yet.
The Senate is controlled by Mr Trump’s fellow Republicans who have shown little inclination toward removing him.
Due to testify in closed session on Wednesday are Philip Reeker, the acting assistant secretary of state for Europe, and Michael Duffey, associate director for national security programs at the White House Office of Management and Budget.
Deputy Assistant Secretary of State Laura Cooper, who oversees the Pentagon’s Ukraine policy, and Alexander Vindman, a Europe adviser on the National Security Council, are scheduled to testify on Thursday.