The White House said on Monday it is denying executive privilege to advisers of former President Donald Trump, whose testimony is being sought by a congressional committee investigating the deadly Jan. 6, 2021, Capitol riot.

In letters dated Feb. 28, a White House lawyer explained to former Trump trade adviser Peter Navarro and to a lawyer for Michael Flynn, Trump’s first national security adviser, that President Joe Biden had determined that executive privilege “is not in the national interest, and therefore is not justified” in certain matters before the committee.

Deputy White House counsel Jonathan C. Su wrote in separate letters regarding the two cases that the subjects where executive privilege did not apply included “events within the White House on or about January 6, 2021; attempts to use the Department of Justice to advance a false narrative that the 2020 election was tainted by widespread fraud; and other efforts to alter election results or obstruct the transfer of power.”