Although the committee did not announce the topic of the hearing in its announcement, Rep. Adam Schiff, D-Calif., a member of the committee, previously said on CBS’ “Face the Nation” last weekend that the next hearing would focus on “efforts to rally this mob on the mall,” and the connections between the Trump White House and various extremist groups at the rally that preceded the attack on the US Capitol, including the Proud Boys, Three Percenters and others. The announcement comes a week after blockbuster testimony before the committee by former White House aide Cassidy Hutchinson, who recalled being told of Trump’s anger when he was told by his Secret Service detail that he could not go to Capitol Hill on January 6. Hutchinson, who was an aide to then-Trump chief of staff Mark Meadows, also testified that Trump and Meadows were told that participants in the Jan. 6 rally were armed. After Hutchinson’s testimony, Sarah Matthews, who served as Trump’s deputy White House press secretary until his resignation shortly after the Jan. 6 attack, tweeted that “anyone who downplays Cassidy Hutchinson’s role or her access to West Wing does not understand how Trump [White House] have worked or are trying to discredit it because they are afraid of how damning that testimony is.” Matthews has been subpoenaed and has agreed to testify at an upcoming hearing, according to two sources familiar with the investigation. The former White House aide has been called to testify at a public hearing as early as next week, sources tell CNN. Over the weekend, Illinois Rep. Adam Kinzinger, a Republican who serves on the committee, told CNN’s Dana Bass that Hutchinson’s testimony had “inspired a lot of people,” and that more witnesses have come forward since her revelations last year. week, adding, “There will be a lot more information — and stay tuned,” without elaborating. Kinzinger told “State of the Union” that he didn’t want to “go into who or any of those details” about potential new witnesses, but noted that “every day we have new people coming in” to the committee. This story has been updated with additional developments on Tuesday. CNN’s Katelyn Polantz, Ryan Nobles and Kevin Liptak contributed to this report.