The panel on Thursday said it is seeking an interview with Trump's daughter and former White House aide Ivanka Trump.
In a letter to Trump, lawmakers said they were seeking her voluntary cooperation as part of their ongoing probe and would limit their questions to issues related to events surrounding that day, including activities leading up to or influencing it and her role in the White House at that time.
According to the panel, she "was present in the Oval Office" during key conversations leading up to Jan. 6, and observed a telephone conversation between President Trump and Vice President Mike Pence on the morning of Jan. 6.
In an interview earlier this month with ABC News's "This Week", Vice chair of the committee, U.S. Representative Liz Cheney, one of two Republican members, said the panel has "firsthand testimony" that Ivanka Trump asked her father to intervene during the Capitol riots.
A statement released by Ivanka Trump's spokesperson acknowledged the request from the panel, but did not address whether she would cooperate with the committee's investigation.
The former president has blasted the committee's probe as a partisan effort, and has sought to stop other aides from testifying and White House documents from reaching the panel.
But to a blow to Trump's camp - the U.S. Supreme Court on Wednesday rejected his efforts to block the release of key White House records relating to January 6th in an 8 to 1 decision.
In a statement, the panel called the ruling - "a victory for the rule of law and American democracy."
