The aide noted that a subpoena would be avoidable if Eastman voluntarily chose to cooperate with the committee’s inquiry.
The Washington Post first reported news of the expected subpoena.
Earlier Tuesday, Rep. Jamie Raskin, a Maryland Democrat who serves on the panel, told CNN that the committee needs “to determine to what extent there was an organized effort against Vice President (Mike) Pence and we believe that, you know, some of the actors’ names have become known, including John Eastman, who laid it out in a memo.”
This story is breaking and will be updated.