Who is Cassidy Hutchinson, the surprise witness at Tuesday's Jan. 6 panel hearing?

Cassidy Hutchinson, a top former aide to Trump White House Chief of Staff Mark Meadows, is seen in a video of her interview with the House select committee investigating the Jan. 6 attack on the U.S. Capitol, during a hearing on Thursday, June 23, 2022, at the Capitol in Washington. (AP Photo/J. Scott Applewhite)

Cassidy Hutchinson revealed one of the Jan. 6 committee hearing’s biggest bombshells: last week, in a taped deposition, she described how Republican lawmakers advocated for blanket pardons for participants of a Dec. 21 White House meeting.

Today Hutchinson, who had been an aide to former White House Chief of Staff Mark Meadows, will appear as the panel’s surprise live witness for an unscheduled hearing, NPR has confirmed. The committee announced Monday that it would hold a hearing Tuesday “to present recently obtained evidence and receive witness testimony,” but as of Tuesday morning it had not formally announced any witnesses or provided other details. To watch a livestream of the hearing starting at 1 p.m., click here.

The secrecy surrounding the hearing appears out of place; Hutchinson’s cooperation with the committee has been an open, public fact.