According to the Washington Post:
Mark Meadows, President Donald Trump’s chief of staff at the time of the Jan. 6 attack on the Capitol, is cooperating with the House committee investigating the pro-Trump insurrection, the committee’s chairman, Rep. Bennie G. Thompson (D-Miss.), said Tuesday.
“Mr. Meadows has been engaging with the Select Committee through his attorney,” Thompson said in a statement. “He has produced records to the committee and will soon appear for an initial deposition.”
Meadows is the highest-profile member of Trump’s inner circle who is known to be cooperating or who the committee has publicly acknowledged is cooperating. Committee members have previously said that many people with connections to the events of that day have voluntarily engaged with investigators, but they have not specified who those individuals are or how high up they were in the Trump administration.