Nevertheless, senior Republican committee member Mike Conaway told reporters on Monday that he expected Bannon to comply with the subpoena.
"This is unacceptable, and the Committee remains united on this matter - the Committee's subpoena remains in effect and his interview has been rescheduled for next week".
Bannon was present in the White House during periods Mueller may be investigating for a possible obstruction of justice charge, and he also shopped opposition research showing Trump's links to the mafia before joining his Republican presidential campaign in 2016.
Bannon refused to answer questions about his time in the White House or on the president's transition team then as well, although he did make an apparent slip-up and admitted he spoke to several high-level White House staff members, including former chief of staff Reince Priebus, about the infamous meeting in Trump Tower that took place in July 2016, according to Axios.
The extension is the third time Bannon's interview has been postponed. During his January 16 appearance, Bannon refused to answer questions about his time in President Donald Trump's administration or the post-election presidential transition, committee members said.
The sources also said that Bannon's team has raised the issue of whether privilege could be invoked to shield him from questions about those topics, even though members of both parties on the committee say no such privilege would apply.
"Should Bannon maintain his refusal to return and testify fully to all questions, the Committee should begin contempt proceedings to compel his testimony", Schiff said.More news: Mobile Phones Do Not Cause Tumours Decide Scientists
Lewandowski was sacked as Trump's campaign manager on June 20, 2016.
"The House Intelligence Committee's interview with Stephen Bannon has been postponed at the Committee's initiative until next week", a spokesperson told Business Insider.
Trump's staff have tried to utilize the concept of executive privilege to withhold information from the committee.
Things haven't gone Steve Bannon's way since he got on the wrong side of President Trump.
One of the people says Bannon plans to tell Mueller "everything" he knows. But he fell from grace with the president after voicing disparaging views of White House operations and other Trump advisers in author Michael Wolff's recently published book, Fire and Fury: Inside the Trump White House.
Bannon is still insisting he will not answer questions relating to Russian Federation. "They can't order [Bannon] to do anything, but he has an interest in keeping the [White House] happy".