The third hearing of the month will look at efforts by Trump to get his vice president to try to overturn the 2020 election.
Former President Donald Trump has rejected the findings of the public hearings, calling the committee “treasonous”.
The first two public hearings this month by the House select committee investigating the January 6 attack have focused on Trump’s alleged role in the 2021 riots.
A hearing set for Wednesday that aimed to examine Trump’s efforts to pressure the Justice Department to validate his election fraud claims was postponed.
Thursday’s hearing will focus on Trump’s push to pressure Vice President Mike Pence to overturn the 2020 elections.
The Washington Post had reported that the committee obtained emails between Thomas and attorney John Eastman, who was involved in efforts to block the certification of President Joe Biden’s victory.
The emails showed that Thomas’ efforts to overturn the election were more extensive than previously known, the Post said.