WASHINGTON, DC - JUNE 23: An image of Cassidy Hutchinson is shown during the fifth hearing held by the Select Committee to Investigate the January 6th Attack on the U.S. Capitol on June 23, 2022 in the Cannon House Office Building in Washington, DC. The bipartisan committee, which has been gathering evidence related to the January 6, 2021 attack at the U.S. Capitol for almost a year, is presenting its findings in a series of televised hearings. On January 6, 2021, supporters of President Donald Trump attacked the U.S. Capitol Building in an attempt to disrupt a congressional vote to confirm the electoral college win for Joe Biden. (Photo by Mandel Ngan-Pool/Getty Images)

WASHINGTON (AP) — The House panel investigating the Capitol insurrection will hear testimony Tuesday from Cassidy Hutchinson, a top aide in Donald Trump’s White House. She’s considered a vital witness in the investigation into the Jan. 6, 2021 attack. A person familiar with the matter confirmed that she would appear, speaking on condition of anonymity because the witness hasn’t been announced. Hutchinson, a special assistant to Trump’s chief of staff, Mark Meadows, has already provided a trove of information to the committee behind closed doors. In brief excerpts of testimony revealed in court filings, Hutchinson told the committee she was in the room for White House meetings where challenges to the election were discussed.