In the weeks following the defeat of Donald Trump, Thomas, a longtime conservative activist, called on Mendous, the White House chief of staff, to make every effort to reverse the election result. “Help this Great President stand firm, Mark !!!” wrote Thomas. “The majority know Biden and the Left is attempting the biggest robbery in our history.” The messages, first reported by The Washington Post and CBS News, continued until the Jan. 6 uprising, when Trump supporters stormed the U.S. Capitol to try to prevent Congress from confirming Joe Biden’s victory.