Trump’s daughter, who was with her father a lot that day, is expected to speak to the committee virtually, according to the people, who were given anonymity to discuss it.
Ivanka Trump is one of more than 800 witnesses interviewed by the commission as she works to compile a record of the attack, the worst in the Capitol in more than two centuries.  She is the first of Trump’s children known to have spoken to the committee and one of the closest people to her father.
Her decision to cooperate is important for the committee, which has been trying to secure an interview with her since the end of January.  It comes less than a week after her husband, Jared Kouchner, testified before the nine-member committee in a virtual meeting that lasted more than six hours.  The members of the committee said that his testimony was useful and they hope to fill the gaps further with its help.
Her testimony, like others before the committee, will be private.  The panel is using the interviews to compile a comprehensive archive and will begin publishing information in the coming months as it holds public hearings and publishes a series of reports on the uprising.
Lawmakers say they want to discuss what Ivanka Trump knew about her father’s efforts, including a phone call they say he witnessed, to pressure then-Vice President Mike Pence to reject Joe Biden’s 2020 election victory as part of his its ritual role in overseeing the vote count.  .  Pence rejected these efforts.
The committee is also interested in any concerns it may have heard from Pence’s staff, members of Congress and the White House’s office about Trump’s pressure on Pence.
Ivanka Trump’s collaboration is at odds with some of her father’s other top advisers, many of whom have refused to cooperate as the former president has fought the investigation.  Trump has sought executive power over documents and interviews, but in many cases has been overturned by the courts or Biden, who holds that power as incumbent president.
Parliament is expected to vote this week to propose allegations of contempt for Trump advisers Peter Navarro and Dan Scavino, both of whom the commission says did not cooperate.  The committee previously voted to file charges of contempt against Trump’s longtime ally, Steve Bannon, who defied congressional summonses, and White House Chief of Staff Mark Meadows, who cut ties with the committee.
Bannon was later indicted by a federal jury and is awaiting prosecution by the Justice Department.  The Department of Justice has not taken any action against Meadows.
Other witnesses who are still close to the former president – and several who were in the White House that day – declined to answer questions from the committee.